СПИСОК патентов США - подгруппа МПК16 H04Q1/446
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| № п/п | Номер патента | Название патента | |||
2002 | |||||
| 1 | 6493432 | System for ensuring calling party privacy in a call screening system | |||
| 2 | 6385299 | Line testing in a telecommunications network | |||
2001 | |||||
| 3 | 6212265 | Method and apparatus for electronic mail notification | |||
| 4 | 6169783 | Line testing in a telecommunications network | |||
1999 | |||||
| 5 | 5920623 | Method and apparatus for defeating a predictive telemarketing system | |||
1993 | |||||
| 6 | 5218635 | Low-frequency alternating current signal detector, in particular for central office line interface circuits | |||
1991 | |||||
| 7 | 5070526 | Signal analyzing system | |||
1990 | |||||
| 8 | 4945555 | Method and means for remote testing of unused telephone lines | |||
1988 | |||||
| 9 | 4792985 | Transmitters and systems for tone-in-band transmission | |||
1986 | |||||
| 10 | 4567328 | Energy detection circuit for a facsimile system controller | |||
1983 | |||||
| 11 | 4384175 | Tone detection method and arrangement for observing and classifying repetitive status signals | |||
1978 | |||||
| 12 | 4099125 | Frequency error correction circuit | |||
1977 | |||||
| 13 | 4037171 | High speed tone decoder utilizing a phase-locked loop | |||
| 14 | 4018996 | Communication network protection system | |||
| © 2017, ПАТ-Инфо, В.И. Карнышев
Дата формирования списка: 03.04.2017 | |||||