Interstate Electronics Corporation
60Patents
30Active
60Granted
48Portfolio score
Filing activity: May 5, 1978 → Jun 16, 2020 · 4 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5640424A | Direct downconverter circuit for demodulator in digital data transmission system | Electricity | 138 | Expired |
| US4456093A | Control system for aerial work platform machine and method of controlling an aerial work platform machine | Performing Operations; Transporting | 130 | Expired |
| US4975691A | Scan inversion symmetric drive | Physics | 108 | Expired |
| US4208906A | Mud gas ratio and mud flow velocity sensor | Physics | 56 | Expired |
| US4297528A | Training circuit for audio signal recognition computer | Physics | 43 | Expired |
| US5825326A | Real-time high-accuracy determination of integer ambiguities in a kinematic GPS receiver | Physics | 40 | Expired |
| US5479328A | High-brightness, high-efficacy backlight | Physics | 38 | Expired |
| US5645337A | Apertured fluorescent illumination device for backlighting an image plane | Performing Operations; Transporting | 33 | Expired |
| US5191305A | Multiple bandpass filter | Electricity | 28 | Expired |
| US7873097B1 | Systems and methods for concatenation in spread spectrum systems | Electricity | 26 | Active |
| US4180762A | Driver circuitry for plasma display panel | Physics | 25 | Expired |
| US4496879A | System for driving AC plasma display panel | Physics | 24 | Expired |
| US10024973B1 | Global navigation satellite system spoofer identification technique | Physics | 24 | Active |
| US4412098A | Audio signal recognition computer | Physics | 24 | Expired |
| US4494121A | Direction finding antenna | Electricity | 22 | Expired |
| US10031234B1 | Global navigation satellite system beam based attitude determination | Physics | 21 | Active |
| US4388495A | Speech recognition microcomputer | Physics | 21 | Expired |
| US5548541A | Finite impulse response filter for modulator in digital data transmission system | Electricity | 21 | Expired |
| US7183971B1 | Hybrid translator in a global positioning system (GPS) | Physics | 20 | Expired |
| US8552349B1 | Projectile guidance kit | Mechanical Engineering; Lighting; Heating | 19 | Active |
| US4492957A | Plasma display panel drive electronics improvement | Physics | 18 | Expired |
| US5179348A | Progression of states numerically controlled oscillator | Physics | 16 | Expired |
| US6452961B1 | Massively paralleled sequential test algorithm | Electricity | 15 | Expired |
| US4414544A | Constant data rate brightness control for an AC plasma panel | Physics | 15 | Expired |
| US4550274A | MOSFET Sustainer circuit for an AC plasma display panel | Physics | 15 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.