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AG Communication Systems Corp

AG Communi
Active Patents
0
Total Holdings
52

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
US4580243A Circuit for duplex synchronization of asynchronous signals Expired / Lapsed 1983-09-14 1986-04-01 6 Details
US4471167A Wireless extension telephone Expired / Lapsed 1982-12-16 1984-09-11 7 Details
US4471493A Wireless telephone extension unit with self-contained dipol… Expired / Lapsed 1982-12-16 1984-09-11 11 Details
US4453042A Telephone station signaling lock circuit Expired / Lapsed 1982-12-23 1984-06-05 13 Details
US4395753A Allocation controller providing for access of multiple comm… Expired / Lapsed 1980-06-26 1983-07-26 15 Details
US4394061A Apparatus for aligning an optical fiber in an LED package Expired / Lapsed 1982-01-22 1983-07-19 20 Details
US4374414A Arbitration controller providing for access of a common res… Expired / Lapsed 1980-06-26 1983-02-15 15 Details
US4354250A Switched-capacitor source resistor simulation circuit Expired / Lapsed 1980-08-11 1982-10-12 17 Details
US4303960A Electrostatic discharge-protected switch Expired / Lapsed 1979-12-31 1981-12-01 9 Details
US4257668A Edge clip terminal for mounting thick film hybrid circuits … Expired / Lapsed 1979-01-02 1981-03-24 4 Details
US4168397A 8-Phase PSK modulator Expired / Lapsed 1978-05-26 1979-09-18 14 Details
US4070568A Lamp cap for use with indicating light assembly Expired / Lapsed 1976-12-09 1978-01-24 9 Details
US4054747A Data buffer Expired / Lapsed 1976-05-20 1977-10-18 11 Details
US4025720A Digital bit rate converter Expired / Lapsed 1975-05-30 1977-05-24 6 Details
US4007333A Automatic call transmitter of the dual tone multifrequency … Expired / Lapsed 1974-05-31 1977-02-08 9 Details
US3993953A Apparatus and method for digitally generating a modified du… Expired / Lapsed 1975-10-17 1976-11-23 12 Details
US3965307A Electronic tone ringer Expired / Lapsed 1974-05-28 1976-06-22 6 Details
US3959775A Multiprocessing system implemented with microprocessors Expired / Lapsed 1974-08-05 1976-05-25 5 Details
US3959594A Arrangement and method for the localized self-control of ra… Expired / Lapsed 1974-07-01 1976-05-25 10 Details
US3921141A Malfunction monitor control circuitry for central data proc… Expired / Lapsed 1973-09-14 1975-11-18 8 Details
US3909551A Dial selective intercommunication system Expired / Lapsed 1974-03-04 1975-09-30 11 Details
US3875347A Multifrequency signal receiver Expired / Lapsed 1973-10-01 1975-04-01 8 Details
US3867585A Electronic tone ringer Expired / Lapsed 1973-08-02 1975-02-18 9 Details
US3866184A Timing monitor circuit for central data processor of digita… Expired / Lapsed 1973-08-31 1975-02-11 17 Details
US3863025A Data transmission method Expired / Lapsed 1973-04-25 1975-01-28 12 Details
US3851311A Arrangement and method for protecting a common highway from… Expired / Lapsed 1973-09-17 1974-11-26 6 Details
US3845425A Method and apparatus for providing conditional and uncondit… Expired / Lapsed 1973-06-15 1974-10-29 11 Details
US3844566A Transcribing device Expired / Lapsed 1971-12-20 1974-10-29 11 Details
US3839599A Line variation compensation system for synchronized pcm dig… Expired / Lapsed 1972-11-10 1974-10-01 7 Details
US3838339A Logic test probe and indicator circuit Expired / Lapsed 1973-08-17 1974-09-24 11 Details
US3838398A Maintenance control arrangement employing data lines for tr… Expired / Lapsed 1973-06-15 1974-09-24 10 Details
US3831151A Sense line processor with priority interrupt arrangement fo… Expired / Lapsed 1973-04-04 1974-08-20 19 Details
US3828321A System for reconfiguring central processor and instruction … Expired / Lapsed 1973-03-15 1974-08-06 13 Details
US3825683A Line variation compensation system for synchronized pcm dig… Expired / Lapsed 1972-11-10 1974-07-23 13 Details
US3823273A Subscriber's telephone circuit Expired / Lapsed 1971-12-17 1974-07-09 12 Details
US3812337A Sequential control circuit having improved fault detection … Expired / Lapsed 1973-04-06 1974-05-21 27 Details
US3812299A Arrangement for protecting a common highway in a common con… Expired / Lapsed 1973-03-28 1974-05-21 9 Details
US3805019A Energy distribution system Expired / Lapsed 1972-08-24 1974-04-16 11 Details
US3805038A Data handling system maintenance arrangement for processing… Expired / Lapsed 1972-07-12 1974-04-16 17 Details
US3795867A Pulse detection arrangement Expired / Lapsed 1973-04-02 1974-03-05 10 Details
US3786436A Memory expansion arrangement in a central processor Expired / Lapsed 1973-03-14 1974-01-15 13 Details
US3786496A Key pad control arrangement Expired / Lapsed 1972-07-25 1974-01-15 9 Details
US3777129A Fault detection and localization in digital systems Expired / Lapsed 1972-05-22 1973-12-04 13 Details
US3760169A Interface system for direct numeric control of automatic wi… Expired / Lapsed 1972-09-18 1973-09-18 22 Details
US3760269A Multi-frequency tone detector Expired / Lapsed 1972-07-31 1973-09-18 11 Details
US3745288A Flexible printed wiring switch Expired / Lapsed 1972-08-07 1973-07-10 10 Details
US3714403A Computer implemented method of detecting and isolating elec… Expired / Lapsed 1971-09-01 1973-01-30 7 Details
US3676923A Methods of producing solenoid array memories Expired / Lapsed 1970-03-16 1972-07-18 5 Details
US3638038A Tone detector control circuit Expired / Lapsed 1970-10-12 1972-01-25 10 Details
US3624305A Communication switching network hold and extra control cond… Expired / Lapsed 1970-07-13 1971-11-30 15 Details
US3624611A Stored-logic real time monitoring and control system Expired / Lapsed 1970-03-09 1971-11-30 9 Details
US3618015A Apparatus for discriminating between errors and faults Expired / Lapsed 1970-06-30 1971-11-02 21 Details