Telefonaktiebolaget LM Ericsson AB
TelefonaktActive Patents
0
Total Holdings
194
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| CA2350922A1 | Concurrent processing for event-based systems | Expired / Lapsed | 1999-11-12 | — | 69 | Details |
| WO1999045736A1 | Telecommunications inter-exchange measurement transfer | Expired / Lapsed | 1999-03-02 | — | 0 | Details |
| CN1292981A | Telecommunications inter-exchange measurement transfer | Expired / Lapsed | 1999-03-02 | — | 0 | Details |
| WO1999017576A1 | Method and apparatus for optimizing antenna tilt | Expired / Lapsed | 1998-09-29 | — | 0 | Details |
| WO1999016224A1 | Reduced complexity bit allocation to subchannels in a multi… | Expired / Lapsed | 1998-09-09 | — | 0 | Details |
| EP0944176A1 | Dual mode communication device and method of operation | Expired / Lapsed | 1998-03-20 | — | 29 | Details |
| EP0845916A2 | Point to multipoint radio access system | Expired / Lapsed | 1997-12-02 | — | 6 | Details |
| EP0515335A2 | Initial power control of mobile station transmission in a m… | Expired / Lapsed | 1992-05-14 | — | 10 | Details |
| EP0514360A2 | A communication system for integrating a paging system with… | Expired / Lapsed | 1992-04-15 | — | 33 | Details |
| EP0504122A2 | Neighbor-assisted handoff in a cellular communications syst… | Expired / Lapsed | 1992-03-10 | — | 28 | Details |
| EP0474615A2 | D.C. offset compensation in a radio receiver | Expired / Lapsed | 1991-09-05 | — | 34 | Details |
| EP0472511A2 | Handoff of a mobile station between half rate and full rate… | Expired / Lapsed | 1991-08-21 | — | 22 | Details |
| EP0462952A1 | A method for regulating power in a digital mobile telephony… | Expired / Lapsed | 1991-05-22 | — | 9 | Details |
| EP0454647A2 | Apparatus and method for directing calls to mobile telephon… | Expired / Lapsed | 1991-04-25 | — | 31 | Details |
| EP0452286A1 | Arrangement for reduced power supply to a subscriber line | Expired / Lapsed | 1991-02-11 | — | 13 | Details |
| EP0415898A1 | A method of adapting a mobile radio communication system to… | Expired / Lapsed | 1990-08-24 | — | 31 | Details |
| WO1991000658A1 | Method for synchronization in a cellular mobile radio system | Expired / Lapsed | 1990-06-13 | — | 0 | Details |
| EP0407367A2 | Method and arrangement for dynamically allocating time slot… | Expired / Lapsed | 1990-05-17 | — | 10 | Details |
| EP0003009A2 | A method and an apparatus for transferring digital informat… | Expired / Lapsed | 1978-12-19 | — | 9 | Details |
| FR2288428A1 | INFORMATION ENCRYPTION AND ENCRYPTION DEVICE | Expired / Lapsed | 1975-10-16 | — | 0 | Details |
| DE2002149B2 | RADAR UNIT FOR DETERMINING THE AVERAGE VALUE OF THE LOCATIO… | Expired / Lapsed | 1970-01-13 | — | 0 | Details |
| DE1963029B2 | ARRANGEMENT FOR DISPLAYING THE CALLING PARTICIPANT OR NEXT … | Expired / Lapsed | 1969-12-08 | — | 0 | Details |
| DE1918782A1 | Circuit for displaying the service class for subscribers in… | Expired / Lapsed | 1969-04-10 | — | 0 | Details |
| DE1234071B | Device for counting and classifying vehicles | Expired / Lapsed | 1962-05-02 | — | 0 | Details |
| GB586753A | Improvements in or relating to automatic telephone systems | Expired / Lapsed | 1944-01-21 | — | 0 | Details |
| GB553947A | Improvements in electrical means for the multiplication of … | Expired / Lapsed | 1941-08-28 | — | 0 | Details |
| US7061880B2 | Systems and methods for multicast communications | Expired / Lapsed | 2001-10-11 | 2006-06-13 | 33 | Details |
| US6952735B1 | Dynamically distributed IP-pool in GPRS | Expired / Lapsed | 2000-08-31 | 2005-10-04 | 10 | Details |
| US6947390B2 | Method for the selection of transmission entities | Expired / Lapsed | 2001-09-05 | 2005-09-20 | 20 | Details |
| US6947401B2 | Hierarchical mobility management for wireless networks | Expired / Lapsed | 2001-02-16 | 2005-09-20 | 30 | Details |
| US6895245B2 | Telecommunications interexchange measurement transfer | Expired / Lapsed | 1998-03-06 | 2005-05-17 | 57 | Details |
| EP0845916B1 | Point to multipoint radio access system | Expired / Lapsed | 1997-12-02 | 2005-03-02 | 6 | Details |
| US6792348B2 | Traffic management system based on packet switching technol… | Expired / Lapsed | 2001-11-21 | 2004-09-14 | 35 | Details |
| US6754228B1 | Method and device for data flow control | Expired / Lapsed | 1999-03-30 | 2004-06-22 | 33 | Details |
| US6728270B1 | Scheduling and admission control of packet data traffic | Expired / Lapsed | 2000-07-13 | 2004-04-27 | 33 | Details |
| US6694247B2 | Traffic management system including a layered management st… | Expired / Lapsed | 2001-11-21 | 2004-02-17 | 6 | Details |
| US6694354B1 | Host computer access to peripheral device drivers | Expired / Lapsed | 1999-09-01 | 2004-02-17 | 18 | Details |
| US6611532B1 | Methods and apparatus for integrating signaling system numb… | Expired / Lapsed | 1999-12-07 | 2003-08-26 | 22 | Details |
| US6608832B2 | Common access between a mobile communications network and a… | Expired / Lapsed | 1998-07-23 | 2003-08-19 | 70 | Details |
| US6606502B1 | Method system and mobile switching center (MSC) for reporti… | Expired / Lapsed | 2000-02-25 | 2003-08-12 | 27 | Details |
| US6587455B1 | Automatic discovery of nodes associated with a virtual subn… | Expired / Lapsed | 1999-05-27 | 2003-07-01 | 28 | Details |
| US6574192B1 | Communications network and an add and drop node | Expired / Lapsed | 1999-06-16 | 2003-06-03 | 9 | Details |
| US6535815B2 | Position updating method for a mobile terminal equipped wit… | Expired / Lapsed | 2000-12-22 | 2003-03-18 | 23 | Details |
| US6504845B1 | Centralized queuing for ATM node | Expired / Lapsed | 1998-11-09 | 2003-01-07 | 59 | Details |
| US6490613B1 | Arrangement for extending service support in a communicatio… | Expired / Lapsed | 1999-10-05 | 2002-12-03 | 8 | Details |
| US6452920B1 | Mobile terminating L2TP using mobile IP data | Expired / Lapsed | 1998-12-30 | 2002-09-17 | 14 | Details |
| US6442615B1 | System for traffic data evaluation of real network with dyn… | Expired / Lapsed | 2000-04-12 | 2002-08-27 | 26 | Details |
| US6430407B1 | Method, apparatus, and arrangement for authenticating a use… | Expired / Lapsed | 1999-02-04 | 2002-08-06 | 23 | Details |
| US6418130B1 | Reuse of security associations for improving hand-over perf… | Expired / Lapsed | 1999-01-21 | 2002-07-09 | 40 | Details |
| US6415279B1 | Method and access means for determining the storage address… | Expired / Lapsed | 1999-03-11 | 2002-07-02 | 34 | Details |
| US6411632B2 | Network hub for interconnecting a wireless office environme… | Expired / Lapsed | 1997-09-16 | 2002-06-25 | 27 | Details |
| US6408174B1 | Communication method, system, and device for reducing proce… | Expired / Lapsed | 1997-05-13 | 2002-06-18 | 8 | Details |
| US6401129B1 | Routing functionality application in a data communications … | Expired / Lapsed | 2000-05-05 | 2002-06-04 | 28 | Details |
| US6396828B1 | Arrangement system and method relating to data network acce… | Expired / Lapsed | 1998-03-12 | 2002-05-28 | 41 | Details |
| US6389037B1 | Arrangement for improving the architecture of mobile commun… | Expired / Lapsed | 1999-10-05 | 2002-05-14 | 7 | Details |
| US6377939B1 | Pipelined method and apparatus for processing communication… | Expired / Lapsed | 1999-05-04 | 2002-04-23 | 29 | Details |
| US6367045B1 | Bandwidth efficient acknowledgment/negative acknowledgment … | Expired / Lapsed | 1999-07-01 | 2002-04-02 | 20 | Details |
| US6363425B1 | Digital telecommunication system with selected combination … | Expired / Lapsed | 1998-08-07 | 2002-03-26 | 29 | Details |
| US6359877B1 | Method and apparatus for minimizing overhead in a communica… | Expired / Lapsed | 1998-07-21 | 2002-03-19 | 18 | Details |
| US6356761B1 | Method and arrangement for finding information | Expired / Lapsed | 1998-08-24 | 2002-03-12 | 28 | Details |
| US6332081B1 | Arrangement for improving availability of services in a com… | Expired / Lapsed | 1999-10-05 | 2001-12-18 | 5 | Details |
| US6308082B1 | Cell-level throughput adjustment in digital cellular systems | Expired / Lapsed | 1998-10-06 | 2001-10-23 | 27 | Details |
| US6298234B1 | System and method for providing access to the internet via … | Expired / Lapsed | 1999-05-18 | 2001-10-02 | 18 | Details |
| US6298339B1 | Management in data structures | Expired / Lapsed | 1998-12-18 | 2001-10-02 | 9 | Details |
| US6295448B1 | Short distance communication and remote control capability … | Expired / Lapsed | 1998-09-21 | 2001-09-25 | 26 | Details |
| US6295293B1 | Access network over a dedicated medium | Expired / Lapsed | 1997-06-04 | 2001-09-25 | 5 | Details |
| US6275709B1 | Arrangement for improving availability of services in a com… | Expired / Lapsed | 1999-10-05 | 2001-08-14 | 17 | Details |
| US6259909B1 | Method for securing access to a remote system | Expired / Lapsed | 1998-07-08 | 2001-07-10 | 29 | Details |
| US6246880B1 | Determining subscriber demands on a communications system | Expired / Lapsed | 1998-11-13 | 2001-06-12 | 32 | Details |
| US6246713B1 | Frequency-hopping in a bandwidth-on-demand system | Expired / Lapsed | 1998-06-08 | 2001-06-12 | 22 | Details |
| US6246878B1 | Magnetoresistive device having a highly smooth metal reflec… | Expired / Lapsed | 1997-11-26 | 2001-06-12 | 15 | Details |
| US6243384B1 | Address analysis for asynchronous transfer mode node with P… | Expired / Lapsed | 1998-03-23 | 2001-06-05 | 24 | Details |
| US6233446B1 | Arrangement for improving security in a communication syste… | Expired / Lapsed | 1999-10-05 | 2001-05-15 | 9 | Details |
| US6233222B1 | Telecommunications inter-exchange congestion control | Expired / Lapsed | 1998-03-06 | 2001-05-15 | 22 | Details |
| US6230013B1 | Diversity handling moveover for CDMA mobile telecommunicati… | Expired / Lapsed | 1997-11-26 | 2001-05-08 | 32 | Details |
| US6230017B1 | Geographical restriction in cellular telecommunications net… | Expired / Lapsed | 1997-08-22 | 2001-05-08 | 35 | Details |
| US6226523B1 | Internet protocol traffic filter for a mobile radio network | Expired / Lapsed | 1997-12-19 | 2001-05-01 | 28 | Details |
| US6223029B1 | Combined mobile telephone and remote control terminal | Expired / Lapsed | 1997-04-29 | 2001-04-24 | 40 | Details |
| US6204804B1 | Method for determining object movement data | Expired / Lapsed | 1999-10-29 | 2001-03-20 | 8 | Details |
| US6198927B1 | Cellular communications systems and methods using mobility-… | Expired / Lapsed | 1997-04-04 | 2001-03-06 | 38 | Details |
| US6195543B1 | Method and apparatus for providing advice of charge paramet… | Expired / Lapsed | 1998-06-01 | 2001-02-27 | 33 | Details |
| US6185535B1 | Voice control of a user interface to service applications | Expired / Lapsed | 1998-10-16 | 2001-02-06 | 36 | Details |
| US6185209B1 | VC merging for ATM switch | Expired / Lapsed | 1997-07-11 | 2001-02-06 | 19 | Details |
| US6175745B1 | Initial transmit power determination in a radiocommunicatio… | Expired / Lapsed | 1997-12-24 | 2001-01-16 | 18 | Details |
| US6173162B1 | Multiple code channel power control in a radio communicatio… | Expired / Lapsed | 1997-06-16 | 2001-01-09 | 19 | Details |
| US6044065A | Resource model and architecture for a connection handling s… | Expired / Lapsed | 1995-06-12 | 2000-03-28 | 6 | Details |
| USD398307S | Mobile telephone and organizer | Expired / Lapsed | 1997-08-13 | 1998-09-15 | 1 | Details |
| US5557655A | Method for analyzing subscriber data received from an HLR i… | Expired / Lapsed | 1993-10-26 | 1996-09-17 | 14 | Details |
| USD310365S | Combination handset telephone and stand | Expired / Lapsed | 1988-02-29 | 1990-09-04 | 1 | Details |
| USD293670S | Combination handset and stand telephone instrument | Expired / Lapsed | 1985-08-22 | 1988-01-12 | 1 | Details |
| US4669107A | Method of increasing the number of call options in a mobile… | Expired / Lapsed | 1986-04-16 | 1987-05-26 | 4 | Details |
| US4628152A | Method and apparatus for transmission of telephone calls to… | Expired / Lapsed | 1983-08-11 | 1986-12-09 | 16 | Details |
| US4622665A | Synchronizing system | Expired / Lapsed | 1983-09-14 | 1986-11-11 | 3 | Details |
| USD278055S | Combined intercom and telephone key base | Expired / Lapsed | 1982-03-26 | 1985-03-19 | 1 | Details |
| USD275392S | Telephone instrument | Expired / Lapsed | 1981-08-10 | 1984-09-04 | 1 | Details |
| US4457579A | Arrangement to reduce influence of diffuse and direct refle… | Expired / Lapsed | 1979-08-14 | 1984-07-03 | 7 | Details |
| USD273108S | Telephone instrument | Expired / Lapsed | 1980-12-04 | 1984-03-20 | 1 | Details |
| USD273107S | Telephone instrument | Expired / Lapsed | 1980-12-04 | 1984-03-20 | 1 | Details |
| USD271487S | Telephone instrument | Expired / Lapsed | 1980-12-04 | 1983-11-22 | 1 | Details |
| USD270836S | Telephone instrument | Expired / Lapsed | 1980-12-04 | 1983-10-04 | 1 | Details |
| USD251377S | Communication radio set | Expired / Lapsed | 1977-04-27 | 1979-03-20 | 1 | Details |
| US4134632A | Attaching means for circuit card connectors | Expired / Lapsed | 1977-08-18 | 1979-01-16 | 6 | Details |
| USD250647S | Telephone accessory | Expired / Lapsed | 1977-01-24 | 1978-12-26 | 1 | Details |
| USD248649S | Telephone instrument | Expired / Lapsed | 1976-03-22 | 1978-07-25 | 1 | Details |
| US4095225A | Range side lobe suppression method for a phase modulated ra… | Expired / Lapsed | 1976-11-22 | 1978-06-13 | 3 | Details |
| US4074073A | Pilot receiver memory unit in a carrier frequency system | Expired / Lapsed | 1976-03-19 | 1978-02-14 | 5 | Details |
| USD244617S | Telephone instrument | Expired / Lapsed | 1976-03-22 | 1977-06-07 | 1 | Details |
| USD243619S | Telephone instrument | Expired / Lapsed | 1975-03-12 | 1977-03-08 | 1 | Details |
| USD243091S | Telephone accessory | Expired / Lapsed | 1974-08-16 | 1977-01-18 | 1 | Details |
| US3980837A | Apparatus for pulsing in telephone sets | Expired / Lapsed | 1975-03-12 | 1976-09-14 | 4 | Details |
| US3976831A | Method for transmitting pictures at a picture telephone tra… | Expired / Lapsed | 1974-12-06 | 1976-08-24 | 3 | Details |
| US3973200A | Process for acknowledging calls in a system for wireless st… | Expired / Lapsed | 1975-01-23 | 1976-08-03 | 4 | Details |
| US3969701A | Function block oriented SPC system | Expired / Lapsed | 1974-03-27 | 1976-07-13 | 10 | Details |
| US3942152A | Verification arrangement | Expired / Lapsed | 1974-11-11 | 1976-03-02 | 8 | Details |
| US3940566A | Arrangement for preventing interruptions in a time division… | Expired / Lapsed | 1974-09-12 | 1976-02-24 | 6 | Details |
| US3902014A | Circuit arrangement for regenerating the modulation timing … | Expired / Lapsed | 1973-08-15 | 1975-08-26 | 4 | Details |
| US3870955A | Emergency switching equipment for broadband transmission | Expired / Lapsed | 1973-05-21 | 1975-03-11 | 18 | Details |
| US3848093A | Apparatus and method for increasing the transmission capaci… | Expired / Lapsed | 1973-02-28 | 1974-11-12 | 4 | Details |
| US3818142A | Device for production of switching order information for tr… | Expired / Lapsed | 1973-01-29 | 1974-06-18 | 3 | Details |
| US3761884A | Arrangement for synchronizing a number of co-operating comp… | Expired / Lapsed | 1971-11-04 | 1973-09-25 | 4 | Details |
| US3729590A | Apparatus for transmitting a data flow by means of a pcm-fl… | Expired / Lapsed | 1972-01-20 | 1973-04-24 | 3 | Details |
| US3668646A | Method of controlling jumps to different programs in a comp… | Expired / Lapsed | 1970-06-10 | 1972-06-06 | 5 | Details |
| US3651263A | Method for synchronizing digital signals and an arrangement… | Expired / Lapsed | 1970-03-13 | 1972-03-21 | 10 | Details |
| US3643030A | Method for transferring information in the form of time sep… | Expired / Lapsed | 1970-02-06 | 1972-02-15 | 18 | Details |
| US3628158A | Arrangement at parallelly working machines | Expired / Lapsed | 1969-10-27 | 1971-12-14 | 8 | Details |
| US3622916A | Periodic frequency characteristic filter for filtering peri… | Expired / Lapsed | 1970-02-24 | 1971-11-23 | 6 | Details |
| US3599158A | Method for moving variable data during operation from a fir… | Expired / Lapsed | 1968-12-18 | 1971-08-10 | 2 | Details |
| US3584207A | Arrangement for carrying out alternatively addition or one … | Expired / Lapsed | 1968-08-19 | 1971-06-08 | 4 | Details |
| US3563229A | Cardiac sound simulator | Expired / Lapsed | 1967-10-25 | 1971-02-16 | 4 | Details |
| US3548296A | Method and apparatus for controlling the phase angle and am… | Expired / Lapsed | 1967-09-19 | 1970-12-15 | 0 | Details |
| US3524940A | Telephone plant with satellite exchanges connected by radia… | Expired / Lapsed | 1966-10-17 | 1970-08-18 | 0 | Details |
| US3517174A | Method of localizing a fault in a system including at least… | Expired / Lapsed | 1966-11-02 | 1970-06-23 | 0 | Details |
| US3503048A | Arrangement in computers for controlling a plant consisting… | Expired / Lapsed | 1967-02-23 | 1970-03-24 | 0 | Details |
| US3475732A | Means for activating a certain instruction out of a plurali… | Expired / Lapsed | 1966-12-27 | 1969-10-28 | 0 | Details |
| US3445816A | Arrangement for connection of at least two conductors | Expired / Lapsed | 1965-06-09 | 1969-05-20 | 0 | Details |
| US3405395A | Circuit arrangement for activating an electric circuit by m… | Expired / Lapsed | 1966-04-12 | 1968-10-08 | 0 | Details |
| US3382409A | Overcurrent-and overvoltage-protection arrangement | Expired / Lapsed | 1966-05-11 | 1968-05-07 | 2 | Details |
| US3335223A | Arrangement for automatic equalization of the distortion in… | Expired / Lapsed | 1963-08-23 | 1967-08-08 | 2 | Details |
| US3304508A | Level regenerating arrangement for transmission of bipolar … | Expired / Lapsed | 1965-01-21 | 1967-02-14 | 2 | Details |
| US3297952A | Circuit arrangement for producing a pulse train in which th… | Expired / Lapsed | 1965-05-28 | 1967-01-10 | 2 | Details |
| US3287575A | Level regenerating arrangement for the transmission of bipo… | Expired / Lapsed | 1964-06-18 | 1966-11-22 | 2 | Details |
| US3287657A | Phase controlled oscillator with a variable synchronizing r… | Expired / Lapsed | 1964-04-06 | 1966-11-22 | 0 | Details |
| US3235861A | Monitoring system for monitoring the potential of conductors | Expired / Lapsed | 1960-10-06 | 1966-02-15 | 2 | Details |
| US3231677A | Inter-register signalling for electronic telephone system | Expired / Lapsed | 1962-04-13 | 1966-01-25 | 2 | Details |
| US3231676A | Circuit for selection of alternative paths in telephone net… | Expired / Lapsed | 1961-12-01 | 1966-01-25 | 1 | Details |
| US3226669A | Wire conductors in electrical connection fields | Expired / Lapsed | 1962-12-12 | 1965-12-28 | 2 | Details |
| US3226485A | Distortion compensation at wide-band transmission over a nu… | Expired / Lapsed | 1962-02-06 | 1965-12-28 | 2 | Details |
| US3146313A | Amplifier arrangement for loudspeaking telephones | Expired / Lapsed | 1962-05-31 | 1964-08-25 | 2 | Details |
| US3113181A | Amplifier arrangement | Expired / Lapsed | 1961-11-10 | 1963-12-03 | 0 | Details |
| US3111559A | Switching means for telephone systems | Expired / Lapsed | 1959-03-06 | 1963-11-19 | 2 | Details |
| US3105118A | Mobile radio stations interconnected with a wire telephone … | Expired / Lapsed | 1960-04-13 | 1963-09-24 | 2 | Details |
| US3045067A | Telephone system with registration for waiting calls | Expired / Lapsed | 1958-05-05 | 1962-07-17 | 0 | Details |
| US2909607A | Automatic telephone system with automatic transfer | Expired / Lapsed | 1955-03-01 | 1959-10-20 | 0 | Details |
| US2820138A | Relay station for transmitting frequency modulated signals | Expired / Lapsed | 1954-10-06 | 1958-01-14 | 0 | Details |
| US2811669A | Method for directing the electron beam of a binary trochotr… | Expired / Lapsed | 1953-07-16 | 1957-10-29 | 0 | Details |
| US2801374A | Relay device | Expired / Lapsed | 1956-09-05 | 1957-07-30 | 0 | Details |
| US2800523A | Device for pressure-tight end sealing of cables | Expired / Lapsed | 1953-10-21 | 1957-07-23 | 0 | Details |
| US2782307A | Electronic switching device for use in radio systems and mu… | Expired / Lapsed | 1951-10-10 | 1957-02-19 | 0 | Details |
| US2779444A | Speed governor, particularly for dials | Expired / Lapsed | 1954-12-28 | 1957-01-29 | 0 | Details |
| FR1127424A | Method and device for estimating probable trajectories of m… | Expired / Lapsed | 1955-02-23 | 1956-12-17 | 0 | Details |
| US2768352A | Compressor-expander transmission system | Expired / Lapsed | 1951-10-10 | 1956-10-23 | 0 | Details |
| US2758263A | Contact device | Expired / Lapsed | 1952-10-03 | 1956-08-07 | 0 | Details |
| US2727947A | Combined telephone and paging system | Expired / Lapsed | 1952-07-09 | 1955-12-20 | 0 | Details |
| US2725474A | Oscillation circuit with superconductor | Expired / Lapsed | 1950-08-04 | 1955-11-29 | 0 | Details |
| US2714630A | Private automatic branch exchange | Expired / Lapsed | 1951-10-22 | 1955-08-02 | 0 | Details |
| US2706248A | Systems for magnetic and electric electron flow control | Expired / Lapsed | 1950-02-13 | 1955-04-12 | 0 | Details |
| US2666884A | Rectifier and converter using superconduction | Expired / Lapsed | 1950-08-04 | 1954-01-19 | 0 | Details |
| US2664552A | Device for connection of cables by means of plugs and socke… | Expired / Lapsed | 1951-06-11 | 1953-12-29 | 0 | Details |
| DE891627C | Sound carrier for magnetic recording and playback of tones | Expired / Lapsed | 1951-10-26 | 1953-10-01 | 0 | Details |
| US2591997A | Electron tube device | Expired / Lapsed | 1949-10-20 | 1952-04-08 | 0 | Details |
| US2583848A | Switching device for the setting of crossbar switches by me… | Expired / Lapsed | 1947-05-23 | 1952-01-29 | 0 | Details |
| US2563807A | Electron discharge apparatus circuit | Expired / Lapsed | 1949-10-13 | 1951-08-14 | 0 | Details |
| US2559746A | Arrangement for night watchman controls | Expired / Lapsed | 1949-04-15 | 1951-07-10 | 0 | Details |
| US2554201A | Key-sending automatic telephone signaling system | Expired / Lapsed | 1947-06-05 | 1951-05-22 | 0 | Details |
| US2542592A | Audio-frequency signaling system | Expired / Lapsed | 1949-01-26 | 1951-02-20 | 0 | Details |
| US2524992A | Frequency modulator | Expired / Lapsed | 1948-03-23 | 1950-10-10 | 0 | Details |
| US2499475A | Device for registering the locations of personnel | Expired / Lapsed | 1947-04-15 | 1950-03-07 | 0 | Details |
| US2482998A | Switching device for distribution of programs | Expired / Lapsed | 1947-03-25 | 1949-09-27 | 0 | Details |
| US2443799A | Cradle-type telephone subset | Expired / Lapsed | 1944-04-03 | 1948-06-22 | 0 | Details |
| US2432600A | Electromagnetic motor | Expired / Lapsed | 1944-09-11 | 1947-12-16 | 0 | Details |
| US2432573A | Self-starting single-phase motor | Expired / Lapsed | 1943-11-29 | 1947-12-16 | 0 | Details |
| US2404331A | Electromagnetic motor | Expired / Lapsed | 1942-10-27 | 1946-07-16 | 0 | Details |
| FR911552A | Metal alloy, in particular for cable sheaths | Expired / Lapsed | 1945-06-08 | 1946-07-12 | 0 | Details |
| US2360027A | Head telephone set | Expired / Lapsed | 1940-10-21 | 1944-10-10 | 0 | Details |
| US2357995A | Remote control system | Expired / Lapsed | 1941-04-16 | 1944-09-12 | 0 | Details |
| US2329048A | Counting device with gaseous discharge valves | Expired / Lapsed | 1939-11-06 | 1943-09-07 | 0 | Details |
| US2220427A | Burglar alarm system | Expired / Lapsed | 1937-03-10 | 1940-11-05 | 0 | Details |
| US2182152A | Electric signaling system | Expired / Lapsed | 1937-01-21 | 1939-12-05 | 0 | Details |
| US2148861A | Impression mechanism | Expired / Lapsed | 1935-11-27 | 1939-02-28 | 0 | Details |
| US2137598A | Artillery projectile | Expired / Lapsed | 1936-03-27 | 1938-11-22 | 0 | Details |
| US1903418A | Inteegrating meter for graded measurements | Expired / Lapsed | 1927-10-03 | 1933-04-11 | 0 | Details |
| US1845604A | Switching arrangement for automatic telephone systems | Expired / Lapsed | 1930-08-25 | 1932-02-16 | 0 | Details |
| US1831730A | Impulse current repeater | Expired / Lapsed | 1929-05-10 | 1931-11-10 | 0 | Details |
| US1831744A | Method and apparatus for measuring the amplification ratio … | Expired / Lapsed | 1929-03-30 | 1931-11-10 | 0 | Details |