СПИСОК патентов США - подгруппа МПК16 H04Q1/38
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| № п/п | Номер патента | Название патента | |||
2016 | |||||
| 1 | 9419339 | Package structures including discrete antennas assembled on a device | |||
2015 | |||||
| 2 | 9179270 | Intercommunication methods and devices based on digital networks | |||
| 3 | 9019290 | Information processing apparatus, information processing system, information processing method and program | |||
2011 | |||||
| 4 | 7929992 | System for transmitting two-way radio communications via computer networks | |||
2006 | |||||
| 5 | 7099686 | Microstrip patch antenna having high gain and wideband | |||
1989 | |||||
| 6 | 4821313 | Paystation transmitter ground detect circuitry | |||
| 7 | 4815126 | Telephone line switch | |||
| 8 | 4815124 | DX circuit | |||
| 9 | 4796290 | Ground start circuit | |||
1988 | |||||
| 10 | 4731827 | Interswitch line circuit | |||
1987 | |||||
| 11 | 4701950 | Telephone answering system with line detector | |||
| 12 | 4679232 | Method and apparatus for providing a ground reference for telephone customer special circuits powered from a floating battery feed | |||
1986 | |||||
| 13 | 4614840 | Telecommunication line circuit and associated polarity reversal circuit | |||
| 14 | 4593156 | Grounded tip detector | |||
1985 | |||||
| 15 | 4551670 | Circuit for maintaining the DC voltage on an electrically isolated telecommunication line at a reference level | |||
| 16 | 4540854 | Subscriber line interface circuit | |||
| 17 | 4535201 | Ground start detection in telephone loop signalling circuit | |||
| 18 | 4523056 | Telephone including resistive array for dialing and system for using such telephone | |||
1984 | |||||
| 19 | 4476557 | Duplex signaling circuit | |||
| 20 | 4454477 | Loop current detector with threshold setting impedance | |||
| 21 | 4440979 | Current sink for DPT channel unit | |||
1982 | |||||
| 22 | 4336467 | Voltage detector | |||
| 23 | 4319092 | Current detection circuit arrangement for an automatic telephone exchange | |||
1981 | |||||
| 24 | 4301334 | Telecommunication subscriber line access circuit with ground key and insulation fault indication | |||
| 25 | 4292473 | Loop supervision circuit | |||
1979 | |||||
| 26 | 4165450 | Telephone signalling test system | |||
1978 | |||||
| 27 | 4110565 | Duplex telephone signalling system | |||
| 28 | 4101733 | Electronic DX signaling circuit | |||
| 29 | 4071879 | Reversible current apparatus | |||
1976 | |||||
| 30 | 3999013 | Bi-directional signaling apparatus | |||
| 31 | 3991324 | Dial pulse detector | |||
| 32 | 3987249 | System for addressed timemultiplexed telecommunication | |||
| © 2017, ПАТ-Инфо, В.И. Карнышев
Дата формирования списка: 03.04.2017 | |||||