Matra Communication
42Patents
0Active
42Granted
38Portfolio score
Filing activity: Aug 20, 1984 → Jan 15, 1998
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5901349A | Mixer device with image frequency rejection | Electricity | 158 | Expired |
| US5448600A | Method for selecting propagation paths retained for receiving messages transmitted by CDMA radiocommunication | Electricity | 107 | Expired |
| US5509028A | Radio transmission method using repeater stations with spectrum reversal | Electricity | 82 | Expired |
| US5280479A | Device for insertion of digital packets in a transmission channel | Electricity | 74 | Expired |
| US5128925A | Process for the pseudo-synchronization of a time multiplexing communication network and uses thereof | Electricity | 66 | Expired |
| USD408397S | Telephone | General | 62 | Expired |
| US5889857A | Acoustical echo canceller with sub-band filtering | Electricity | 54 | Expired |
| US5905760A | Method of correcting nonlinearities of an amplifier, and radio transmitter employing a method of this type | Electricity | 50 | Expired |
| US5903611A | Method of correcting nonlinearities of an amplifier, and radio transmitter employing a method of this type | Electricity | 45 | Expired |
| US5398247A | TDMA radio-communication method | Electricity | 42 | Expired |
| US5544155A | Method of synchronization for code division multiple access radiotelephone communications | Electricity | 39 | Expired |
| US6052576A | Radiocommunications equipment with a security calls mode, and extension unit forming part of such equipment | Electricity | 34 | Expired |
| US5544167A | Transmission method for CDMA radiotelephone communications, and apparatuses for implementing such method | Electricity | 31 | Expired |
| US5974377A | Analysis-by-synthesis speech coding method with open-loop and closed-loop search of a long-term prediction delay | Physics | 30 | Expired |
| US5818866A | Method of selecting propagation delays retained for receiving messages transmitted by spread spectrum radio communication | Electricity | 29 | Expired |
| USD377489S | Portable radiotelephone | General | 27 | Expired |
| US5963898A | Analysis-by-synthesis speech coding method with truncation of the impulse response of a perceptual weighting filter | Physics | 26 | Expired |
| USD324682S | Telephone set | General | 26 | Expired |
| US5642465A | Linear prediction speech coding method using spectral energy for quantization mode selection | Physics | 21 | Expired |
| US6108413A | Echo cancellation method and echo canceller implementing such a process | Electricity | 18 | Expired |
| US5848151A | Acoustical echo canceller having an adaptive filter with passage into the frequency domain | Electricity | 18 | Expired |
| USD311918S | Telephone set | General | 17 | Expired |
| US5790942A | Frequency modulation radio transmission device | Electricity | 14 | Expired |
| US5850403A | Process of selectively protecting information bits against transmission errors | Electricity | 12 | Expired |
| USD338874S | Cabinet for PBX circuits | General | 11 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.