Comsat, Inc.
102Patents
3Active
102Granted
44Portfolio score
Filing activity: Jun 23, 1988 → Oct 8, 2019 · 1 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5375146A | Digital frequency conversion and tuning scheme for microwave radio receivers and transmitters | Electricity | 244 | Expired |
| US5293449A | Analysis-by-synthesis 2,4 kbps linear predictive speech codec | Physics | 154 | Expired |
| US5640416A | Digital downconverter/despreader for direct sequence spread spectrum communications system | Electricity | 136 | Expired |
| US5534877A | Orthogonally polarized dual-band printed circuit antenna employing radiating elements capacitively coupled to feedlines | Electricity | 123 | Expired |
| US5307441A | Wear-toll quality 4.8 kbps speech codec | Physics | 116 | Expired |
| US5142224A | Non-destructive semiconductor wafer probing system using laser pulses to generate and detect millimeter wave signals | Physics | 113 | Expired |
| US6963570B1 | Method and apparatus for adaptive loss-less compression of cell/packet headers | Electricity | 110 | Expired |
| US6052364A | CDMA system architecture for satcom terminals | Electricity | 97 | Expired |
| US6477669B1 | Method and apparatus for adaptive control of forward error correction codes | Electricity | 88 | Expired |
| US5063177A | Method of packaging microwave semiconductor components and integrated circuits | Electricity | 86 | Expired |
| US5453799A | Unified motion estimation architecture | Electricity | 81 | Expired |
| US5394439A | Bisdn compatible modem codec for digital information communication system | Electricity | 73 | Expired |
| US6819658B1 | Method and apparatus for segmentation, reassembly and inverse multiplexing of packets and ATM cells over satellite/wireless networks | Electricity | 66 | Expired |
| US5600653A | Technique for improving asynchronous transfer mode operation over a communications link with bursty bit errors | Electricity | 64 | Expired |
| US5487086A | Transform vector quantization for adaptive predictive coding | Physics | 63 | Expired |
| US5354630A | Ni-H.sub.2 battery having improved thermal properties | Emerging Cross-Sectional Technologies | 62 | Expired |
| US5481561A | Fully meshed CDMA network for personal communications terminals | Emerging Cross-Sectional Technologies | 59 | Expired |
| US5272446A | Digitally implemented fast frequency estimator/demodulator for low bit rate maritime and mobile data communications without the use of an acquisition preamble | Electricity | 58 | Expired |
| US5696796A | Continuously variable if sampling method for digital data transmission | Electricity | 56 | Expired |
| US5533052A | Adaptive predictive coding with transform domain quantization based on block size adaptation, backward adaptive power gain control, split bit-allocation and zero input response compensation | Physics | 55 | Expired |
| US5889821A | Low noise front-end blanking and interleaving for satellite reception in pulsed interference environments | Electricity | 51 | Expired |
| US5226044A | Low-rate encoding/digital speech interpolation system | Electricity | 48 | Expired |
| US5070400A | Pay-tv time purchase scheme | Electricity | 47 | Expired |
| US6141372A | Digital downconverter/despreader for direct sequence spread spectrum CDMA communications system | Electricity | 46 | Expired |
| US6810377B1 | Lost frame recovery techniques for parametric, LPC-based speech coding systems | Physics | 45 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.