СПИСОК патентов США - подгруппа МПК16 H04Q1/36
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| № п/п | Номер патента | Название патента | |||
1992 | |||||
| 1 | 5086462 | Terminal repeater having a function for repeating DC loop signal | |||
1989 | |||||
| 2 | 4839920 | Method for determining telephone dial pulse parameters independently of subscriber line length | |||
1986 | |||||
| 3 | 4590432 | Constant-percent break pulse corrector | |||
1985 | |||||
| 4 | 4555593 | Electronic telephone relay | |||
| 5 | 4552994 | Apparatus for isolating the voice frequency path from the floating battery feed during signalling | |||
1982 | |||||
| 6 | 4326105 | Dial pulse detector | |||
| 7 | 4319091 | Dial pulse restorer | |||
1981 | |||||
| 8 | 4278842 | Circuit for eliminating spurious pulses in a dial pulse stream | |||
| 9 | 4266099 | Pulse rejection and duration correction circuit | |||
1980 | |||||
| 10 | 4230912 | Dial pulse sensor and repeater circuit | |||
| 11 | 4227054 | Digital constant-percent break pulse corrector | |||
| 12 | 4223184 | Minimum break/make pulse corrector | |||
| 13 | 4207436 | Constant percent break type dial pulse corrector | |||
| 14 | 4198547 | Pulse circuit for two wire electronic PABX stations | |||
| 15 | 4184053 | Ringing signal detector | |||
1978 | |||||
| 16 | 4087644 | Dial impulse relay circuit | |||
| 17 | 4075569 | Digital method and apparatus for dynamically generating an output pulse train having a desired duty cycle from an input pulse train | |||
1977 | |||||
| 18 | 4004238 | Method and apparatus for the removal of ringing phenomena from signal impulses | |||
1976 | |||||
| 19 | 3988548 | Dial pulse correction circuit for telephone signaling system | |||
| 20 | 3985970 | Regeneration of signalling pulses | |||
| 21 | 3978283 | Switching arrangement for receiving DC signals | |||
| © 2017, ПАТ-Инфо, В.И. Карнышев
Дата формирования списка: 03.04.2017 | |||||