Northrop Corporation
319Patents
0Active
319Granted
43Portfolio score
Filing activity: Jul 28, 1969 → May 22, 1996
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5081558A | High voltage DC relays | Electricity | 233 | Expired |
| US5153771A | Coherent light modulation and detector | Physics | 193 | Expired |
| US5170283A | Silicon spatial light modulator | Physics | 182 | Expired |
| US4189748A | Video bandwidth reduction system using a two-dimensional transformation, and an adaptive filter with error correction | Electricity | 128 | Expired |
| US5596332A | Aircraft location and identification system | Physics | 126 | Expired |
| US5108532A | Method and apparatus for shaping, forming, consolidating and co-consolidating thermoplastic or thermosetting composite products | Performing Operations; Transporting | 123 | Expired |
| US4224678A | Method and apparatus for implementing a processor based on the rationalized Haar transform for the purpose of real time compression of video data | Electricity | 116 | Expired |
| US5003631A | Flight helmet with headset | Emerging Cross-Sectional Technologies | 97 | Expired |
| US5205171A | Miniature silicon accelerometer and method | Physics | 95 | Expired |
| US5033014A | Integrated manufacturing system | Emerging Cross-Sectional Technologies | 83 | Expired |
| US4651781A | Distributed accumulator | Mechanical Engineering; Lighting; Heating | 79 | Expired |
| US4945488A | Integrated aircraft manufacturing system | Emerging Cross-Sectional Technologies | 78 | Expired |
| US4310269A | Drill break-through sensor | Emerging Cross-Sectional Technologies | 75 | Expired |
| US5326206A | Method for compensating for bolt hole misalignment and bolt assemblies therefor | Emerging Cross-Sectional Technologies | 75 | Expired |
| US5065444A | Streak removal filtering method and apparatus | Electricity | 70 | Expired |
| US5292475A | Tooling and process for variability reduction of composite structures | Performing Operations; Transporting | 68 | Expired |
| US5023800A | Assembly data model system | Emerging Cross-Sectional Technologies | 67 | Expired |
| US5322243A | Separately banking maneuvering aerodynamic control surfaces, system and method | Performing Operations; Transporting | 65 | Expired |
| US4863330A | Composite fastener and method of manufacture | Emerging Cross-Sectional Technologies | 63 | Expired |
| US4776749A | Robotic device | Emerging Cross-Sectional Technologies | 63 | Expired |
| US4978825A | Thermoplastic composite induction welder | Performing Operations; Transporting | 60 | Expired |
| US5156358A | Aircraft outboard control | Emerging Cross-Sectional Technologies | 59 | Expired |
| US4937768A | Integrated assembly system | Emerging Cross-Sectional Technologies | 56 | Expired |
| US4729528A | Aeroelastic control flap | Emerging Cross-Sectional Technologies | 55 | Expired |
| US4869813A | Drill inspection and sorting method and apparatus | Emerging Cross-Sectional Technologies | 54 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.