Average Co-Inventor Count = 1.33
ph-index = 6
The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.
Company Filing History:
1. Telecommunications Radioelectriques Et Telephoniques T.r.t. (13 from 70 patents)
2. U.S. Philips Corporation (4 from 14,087 patents)
3. Etat Francais (1 from 132 patents)
4. Telecommunications Radioelectriques Et Telephoniques (1 from 14 patents)
5. T.r.t. Telecommunications Radioelectriques (1 from 1 patent)
19 patents:
1. 4827472 - Echo canceller using delta modulation
2. 4484034 - Anti-larsen-effect arrangement in a telephone station equipped with a
3. 4481463 - Current mirror circuit
4. 4454384 - Hands free telephone with switchable gain in the two speech signal paths
5. 4453039 - Arrangement for avoiding annoying sustained oscillations in a
6. 4414434 - Electronic subscriber line interface circuit having means to equalize
7. 4386236 - Automatic sound level control of telephone station
8. 4356355 - Apparatus for detecting the closure of a subscriber's line during ringing
9. 4356354 - Electronic subscriber junctor
10. 4321430 - Subscriber's connecting network comprising a symmetrical power amplifier
11. 4275277 - Subscriber line interface circuit for a telephone line
12. 4225963 - Arrangement for processing a delta modulation signal, in particular for
13. 4211896 - Subscriber's circuit with a symmetrical amplifier
14. 4187400 - Time-division multiplex communication system for connecting two-wire
15. 4184150 - Circuit arrangement for halving the sampling rate of a delta modulation