Northrop Grumman Corp
Northrop GActive Patents
0
Total Holdings
132
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US5481269A | General frame wavelet classifier | Expired / Lapsed | 1994-05-27 | 1996-01-02 | 38 | Details |
| US5229677A | Electric propulsion motor for marine vehicles | Expired / Lapsed | 1991-09-18 | 1993-07-20 | 38 | Details |
| US5214438A | Millimeter wave and infrared sensor in a common receiving a… | Expired / Lapsed | 1991-08-09 | 1993-05-25 | 33 | Details |
| US5155542A | Doublet pulse phase conjugate atmospheric energy transfer s… | Expired / Lapsed | 1990-10-24 | 1992-10-13 | 26 | Details |
| US5091646A | Integrated thermal imaging system | Expired / Lapsed | 1990-05-29 | 1992-02-25 | 108 | Details |
| US5078628A | Marine propulsor | Expired / Lapsed | 1989-06-23 | 1992-01-07 | 143 | Details |
| US5025451A | Two-dimensional integrated laser array | Expired / Lapsed | 1989-10-20 | 1991-06-18 | 20 | Details |
| US4983084A | Double locked threaded fastener | Expired / Lapsed | 1989-09-26 | 1991-01-08 | 15 | Details |
| US4922253A | High attenuation broadband high speed RF shutter and method… | Expired / Lapsed | 1989-01-03 | 1990-05-01 | 11 | Details |
| US4919536A | System for measuring velocity field of fluid flow utilizing… | Expired / Lapsed | 1988-06-06 | 1990-04-24 | 39 | Details |
| US4912387A | Adaptive noise cancelling for magnetic bearing auto-balanci… | Expired / Lapsed | 1988-12-27 | 1990-03-27 | 14 | Details |
| US4776749A | Robotic device | Expired / Lapsed | 1986-03-25 | 1988-10-11 | 12 | Details |
| US4762455A | Remote manipulator | Expired / Lapsed | 1987-06-01 | 1988-08-09 | 21 | Details |
| US4746977A | Remotely operated steerable vehicle with improved arrangeme… | Expired / Lapsed | 1987-03-12 | 1988-05-24 | 14 | Details |
| US4653002A | Navigation system for unmanned vehicles | Expired / Lapsed | 1984-09-26 | 1987-03-24 | 10 | Details |
| US4649727A | Rotary driver and swaging tool | Expired / Lapsed | 1984-11-15 | 1987-03-17 | 7 | Details |
| US4604733A | Apparatus for determining range and bearing | Expired / Lapsed | 1984-01-03 | 1986-08-05 | 14 | Details |
| US4530138A | Method of making a transducer assembly | Expired / Lapsed | 1982-09-30 | 1985-07-23 | 12 | Details |
| US4445751A | Metal coated, tapered, optical fiber coupled to substrate a… | Expired / Lapsed | 1981-10-19 | 1984-05-01 | 10 | Details |
| US4320388A | Two wire optical data communication system | Expired / Lapsed | 1980-07-15 | 1982-03-16 | 8 | Details |
| US4311391A | Passive fiber optic sonar system | Expired / Lapsed | 1979-12-27 | 1982-01-19 | 9 | Details |
| US4253168A | CCD Signal processor | Expired / Lapsed | 1978-10-23 | 1981-02-24 | 12 | Details |
| US4227110A | Transducer control system | Expired / Lapsed | 1976-11-10 | 1980-10-07 | 13 | Details |
| US4133039A | True mean rate measuring system | Expired / Lapsed | 1976-11-09 | 1979-01-02 | 8 | Details |
| US3813647A | Apparatus and method for performing on line-monitoring and … | Expired / Lapsed | 1973-02-28 | 1974-05-28 | 46 | Details |
| US3739232A | Interconnected electrical circuit board assembly and method… | Expired / Lapsed | 1972-04-10 | 1973-06-12 | 9 | Details |
| US3739378A | Radio tracking system | Expired / Lapsed | 1971-06-14 | 1973-06-12 | 11 | Details |
| US3721989A | Cross loop antenna | Expired / Lapsed | 1971-06-30 | 1973-03-20 | 10 | Details |
| US3681758A | Data acquisition unit with memory | Expired / Lapsed | 1970-04-29 | 1972-08-01 | 15 | Details |
| US3602903A | Optical sensing system for detecting and storing the positi… | Expired / Lapsed | 1969-01-06 | 1971-08-31 | 11 | Details |
| US3581014A | Integrated system for reporting aircraft data | Expired / Lapsed | 1970-02-09 | 1971-05-25 | 8 | Details |
| US3573828A | Synchronization indicator | Expired / Lapsed | 1969-04-15 | 1971-04-06 | 9 | Details |
| US3471652A | System for recording operational failure history | Expired / Lapsed | 1965-05-24 | 1969-10-07 | 0 | Details |
| US3423155A | Optical sight | Expired / Lapsed | 1964-04-13 | 1969-01-21 | 2 | Details |
| US3408532A | Electron beam scanning device | Expired / Lapsed | 1965-12-06 | 1968-10-29 | 2 | Details |
| US3350577A | Solid state gating circuit | Expired / Lapsed | 1965-03-08 | 1967-10-31 | 2 | Details |
| US3281601A | Cathode ray tube device for tracking light spot on tube face | Expired / Lapsed | 1963-10-11 | 1966-10-25 | 2 | Details |
| US3263824A | Servo controlled manipulator device | Expired / Lapsed | 1963-12-20 | 1966-08-02 | 2 | Details |
| US3250559A | Captive screw | Expired / Lapsed | 1963-10-14 | 1966-05-10 | 2 | Details |
| US3245156A | Audio-visual display system | Expired / Lapsed | 1963-09-23 | 1966-04-12 | 2 | Details |
| US3242979A | Liquid and gas cooled garment | Expired / Lapsed | 1963-08-19 | 1966-03-29 | 2 | Details |
| US3215768A | Flexible wire and cable shielding | Expired / Lapsed | 1963-09-23 | 1965-11-02 | 2 | Details |
| US3181170A | Optical display device | Expired / Lapsed | 1963-07-25 | 1965-04-27 | 2 | Details |
| US3095492A | Controlled resistance spot heating device | Expired / Lapsed | 1961-12-26 | 1963-06-25 | 2 | Details |
| US3087235A | Disengaging tool | Expired / Lapsed | 1960-12-12 | 1963-04-30 | 2 | Details |
| US3088033A | Automatic multiple grid scanning tracker | Expired / Lapsed | 1953-08-31 | 1963-04-30 | 2 | Details |
| US3047648A | Transistor clip, heat sink type | Expired / Lapsed | 1959-05-04 | 1962-07-31 | 0 | Details |
| US3045196A | Differential transformers | Expired / Lapsed | 1959-02-13 | 1962-07-17 | 0 | Details |
| US3039349A | Optical device having light filtering means | Expired / Lapsed | 1959-10-19 | 1962-06-19 | 0 | Details |
| US3016273A | Pivot-type self-aligning hydrostatic bearing assembly | Expired / Lapsed | 1960-06-29 | 1962-01-09 | 0 | Details |
| US3015702A | Multichannel audio warning system | Expired / Lapsed | 1959-05-29 | 1962-01-02 | 0 | Details |
| US2998999A | Self-aligning shaft and hydrostatic bearings assembly | Expired / Lapsed | 1958-12-05 | 1961-09-05 | 0 | Details |
| US2994813A | Incremental motor system | Expired / Lapsed | 1959-09-21 | 1961-08-01 | 0 | Details |
| US2981842A | Automatic grid scanning tracker | Expired / Lapsed | 1953-09-01 | 1961-04-25 | 0 | Details |
| US2973013A | Hydraulic valve | Expired / Lapsed | 1956-05-15 | 1961-02-28 | 0 | Details |
| US2968735A | Fan scanner celestial detector system | Expired / Lapsed | 1953-08-17 | 1961-01-17 | 0 | Details |
| US2966823A | Tracking telescope with dual field optical system | Expired / Lapsed | 1948-08-21 | 1961-01-03 | 0 | Details |
| US2962925A | Secondary observation window for a tracking telescope | Expired / Lapsed | 1949-06-24 | 1960-12-06 | 0 | Details |
| US2958483A | Longitudinal stability augmenter | Expired / Lapsed | 1953-08-03 | 1960-11-01 | 0 | Details |
| US2958783A | Scanner | Expired / Lapsed | 1949-03-14 | 1960-11-01 | 0 | Details |
| US2939102A | Self-aligning quick disconnect plug | Expired / Lapsed | 1955-11-04 | 1960-05-31 | 0 | Details |
| US2931910A | Automatic star tracker | Expired / Lapsed | 1949-03-14 | 1960-04-05 | 0 | Details |
| US2924809A | Transistor clip | Expired / Lapsed | 1957-05-13 | 1960-02-09 | 0 | Details |
| US2923759A | Temperature controller | Expired / Lapsed | 1955-01-10 | 1960-02-02 | 0 | Details |
| US2923202A | Dual field optical system | Expired / Lapsed | 1953-05-26 | 1960-02-02 | 0 | Details |
| US2921740A | Binary incremental slope computer | Expired / Lapsed | 1949-12-19 | 1960-01-19 | 0 | Details |
| US2917601A | Printed circuit relay | Expired / Lapsed | 1957-09-16 | 1959-12-15 | 0 | Details |
| US2892049A | Magnetic switch | Expired / Lapsed | 1957-04-08 | 1959-06-23 | 0 | Details |
| US2886010A | Closed loop servo system with magnetic feedback means | Expired / Lapsed | 1957-07-12 | 1959-05-12 | 0 | Details |
| US2886243A | Incremental slope function generator | Expired / Lapsed | 1949-12-19 | 1959-05-12 | 0 | Details |
| US2871703A | Gyro | Expired / Lapsed | 1948-11-13 | 1959-02-03 | 0 | Details |
| US2852187A | Automatic coding system for a digital differential analyzer | Expired / Lapsed | 1952-12-16 | 1958-09-16 | 0 | Details |
| US2850232A | Machine for digital differential analysis | Expired / Lapsed | 1951-12-26 | 1958-09-02 | 0 | Details |
| US2841328A | Digital differential analyzer | Expired / Lapsed | 1950-03-06 | 1958-07-01 | 0 | Details |
| US2833496A | Flight control system | Expired / Lapsed | 1954-12-13 | 1958-05-06 | 0 | Details |
| US2827232A | Quantizer | Expired / Lapsed | 1954-08-27 | 1958-03-18 | 0 | Details |
| US2822783A | Hydraulic servo control valve | Expired / Lapsed | 1955-12-16 | 1958-02-11 | 0 | Details |
| US2820600A | Aircraft control surface assembly and actuating mechanism | Expired / Lapsed | 1954-05-24 | 1958-01-21 | 0 | Details |
| US2820688A | Digital differential analyzer magnetic drum | Expired / Lapsed | 1952-09-10 | 1958-01-21 | 0 | Details |
| US2816448A | Directional gyro | Expired / Lapsed | 1949-06-17 | 1957-12-17 | 0 | Details |
| US2795778A | Tow target | Expired / Lapsed | 1955-05-03 | 1957-06-11 | 0 | Details |
| US2783455A | Self synchronous delay line | Expired / Lapsed | 1955-07-05 | 1957-02-26 | 0 | Details |
| US2778981A | Indexing mechanism | Expired / Lapsed | 1954-01-18 | 1957-01-22 | 0 | Details |
| US2777655A | Airplane with separable fuel tanks | Expired / Lapsed | 1951-03-26 | 1957-01-15 | 0 | Details |
| US2774957A | Analogue to digital function converter | Expired / Lapsed | 1954-03-05 | 1956-12-18 | 0 | Details |
| US2773983A | Electronic counting device | Expired / Lapsed | 1952-11-13 | 1956-12-11 | 0 | Details |
| US2769680A | Graph plotter | Expired / Lapsed | 1953-06-11 | 1956-11-06 | 0 | Details |
| US2769939A | Read-out tube circuit | Expired / Lapsed | 1950-06-12 | 1956-11-06 | 0 | Details |
| US2764556A | Dye solution flaw inspection composition | Expired / Lapsed | 1953-11-19 | 1956-09-25 | 2 | Details |
| US2764172A | Air venting valve | Expired / Lapsed | 1951-10-22 | 1956-09-25 | 0 | Details |
| US2763189A | Rocket and fuel pod | Expired / Lapsed | 1952-08-30 | 1956-09-18 | 0 | Details |
| US2751752A | Electric-hydraulic flap control system | Expired / Lapsed | 1953-04-17 | 1956-06-26 | 0 | Details |
| US2749753A | Temperature measuring device | Expired / Lapsed | 1953-05-11 | 1956-06-12 | 0 | Details |
| US2744420A | Cable slack compensator | Expired / Lapsed | 1952-07-11 | 1956-05-08 | 0 | Details |
| US2736522A | Aircraft load ejection device | Expired / Lapsed | 1953-08-21 | 1956-02-28 | 0 | Details |
| US2728868A | Liquid filled accelerometer | Expired / Lapsed | 1951-09-24 | 1955-12-27 | 0 | Details |
| US2727428A | Means for photographing a path of greater linear dimension … | Expired / Lapsed | 1952-09-29 | 1955-12-20 | 0 | Details |
| US2723346A | Delayed switching circuit | Expired / Lapsed | 1951-04-23 | 1955-11-08 | 0 | Details |
| US2713680A | Binary contact making counter | Expired / Lapsed | 1949-06-21 | 1955-07-19 | 0 | Details |
| US2704431A | Stable resonant circuit | Expired / Lapsed | 1949-01-17 | 1955-03-22 | 0 | Details |
| US2700632A | Method of making a honeycomb sandwich | Expired / Lapsed | 1949-09-09 | 1955-01-25 | 2 | Details |
| US2676127A | Method of making a nonporous duct | Expired / Lapsed | 1951-05-08 | 1954-04-20 | 2 | Details |
| US2658142A | High-speed commutator | Expired / Lapsed | 1951-07-09 | 1953-11-03 | 0 | Details |
| US2639875A | Aircraft control element force producer | Expired / Lapsed | 1950-01-30 | 1953-05-26 | 0 | Details |
| US2637812A | Electronic pulse spacer | Expired / Lapsed | 1949-06-14 | 1953-05-05 | 0 | Details |
| US2635195A | Graph sensing device | Expired / Lapsed | 1951-03-12 | 1953-04-14 | 0 | Details |
| US2631571A | Hydraulic motor and control valve | Expired / Lapsed | 1948-03-29 | 1953-03-17 | 0 | Details |
| US2624848A | Graph transformation device | Expired / Lapsed | 1951-11-23 | 1953-01-06 | 0 | Details |
| US2624039A | Direct current regulated power supply | Expired / Lapsed | 1951-04-23 | 1952-12-30 | 0 | Details |
| US2621854A | Zero detector for electronic counters | Expired / Lapsed | 1948-12-20 | 1952-12-16 | 0 | Details |
| US2620440A | Electronic counting device | Expired / Lapsed | 1949-10-29 | 1952-12-02 | 0 | Details |
| US2618183A | Removing tool | Expired / Lapsed | 1951-05-01 | 1952-11-18 | 0 | Details |
| US2618697A | Two-way sectional read-out tube | Expired / Lapsed | 1950-11-24 | 1952-11-18 | 0 | Details |
| US2618760A | Glow tube anode construction | Expired / Lapsed | 1950-11-06 | 1952-11-18 | 0 | Details |
| US2612872A | Hydraulic coupling valve | Expired / Lapsed | 1949-10-25 | 1952-10-07 | 0 | Details |
| US2607270A | Depth measurement microscope | Expired / Lapsed | 1949-08-29 | 1952-08-19 | 0 | Details |
| US2605094A | Accelerometer | Expired / Lapsed | 1950-10-02 | 1952-07-29 | 0 | Details |
| US2597796A | Electronic cathode gate | Expired / Lapsed | 1949-02-04 | 1952-05-20 | 0 | Details |
| US2586002A | Air cycle cooling system | Expired / Lapsed | 1949-06-20 | 1952-02-19 | 0 | Details |
| US2582358A | Method of producing stiffened skin panel | Expired / Lapsed | 1948-06-08 | 1952-01-15 | 0 | Details |
| US2580498A | Electrooptical pulse generator | Expired / Lapsed | 1948-05-17 | 1952-01-01 | 0 | Details |
| US2575517A | Glow tube counting circuit | Expired / Lapsed | 1950-01-21 | 1951-11-20 | 0 | Details |
| US2575516A | Glow tube switch | Expired / Lapsed | 1949-06-20 | 1951-11-20 | 0 | Details |
| US2558593A | Reflecting telescope | Expired / Lapsed | 1949-03-25 | 1951-06-26 | 0 | Details |
| US2558178A | Glow tube counter | Expired / Lapsed | 1948-11-13 | 1951-06-26 | 0 | Details |
| US2414551A | Compressor | Expired / Lapsed | 1941-10-06 | 1947-01-21 | 0 | Details |
| US2412647A | Aircraft | Expired / Lapsed | 1944-08-08 | 1946-12-17 | 0 | Details |
| US2376265A | Inert gas blanketed arc welding torch | Expired / Lapsed | 1943-02-25 | 1945-05-15 | 0 | Details |
| US2374019A | Machine for dimpling or the like | Expired / Lapsed | 1942-11-13 | 1945-04-17 | 0 | Details |
| US2348921A | Draw press | Expired / Lapsed | 1941-08-16 | 1944-05-16 | 0 | Details |
| US2342086A | Method of welding magnesium and alloys thereof | Expired / Lapsed | 1943-01-14 | 1944-02-15 | 0 | Details |
| US2296023A | Burner | Expired / Lapsed | 1941-03-03 | 1942-09-15 | 0 | Details |