СПИСОК патентов США - подгруппа МПК16 H04Q5/02
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| № п/п | Номер патента | Название патента | |||
2012 | |||||
| 1 | 8331931 | System and method for cordless handset registration | |||
2003 | |||||
| 2 | 6594688 | Dedicated echo canceler for a workstation | |||
| 3 | 6539086 | System and method for completing two calls using analog interface to telephone network | |||
2002 | |||||
| 4 | 6427007 | System and method for completing a call while at least one call is established using analog interface to telephone network | |||
| 5 | 6411695 | System and method for completing two calls using analog interface to telephone network | |||
2001 | |||||
| 6 | 6263063 | System and method for provisioning an extra line on demand and for selectively connecting calls with a plurality of devices | |||
1996 | |||||
| 7 | 5544235 | Identification of called directory number at multiple directory number per line premises prior to ringing signal reception | |||
1993 | |||||
| 8 | 5253289 | Terminal connection device | |||
1992 | |||||
| 9 | 5142569 | Apparatus for selectively enabling subscriber device to respond to ringing signal in dependence upon ringing cadence | |||
| 10 | 5140630 | Added main line apparatus | |||
1988 | |||||
| 11 | 4741024 | Selective ringing circuit for a telephone | |||
1987 | |||||
| 12 | 4701949 | Frequency responsive party telephone line selection apparatus and method | |||
| 13 | 4645877 | Interface for connecting standard telephones to party lines | |||
1986 | |||||
| 14 | 4587380 | Interface for connecting standard telephones to party lines | |||
| 15 | 4567330 | Interface for connecting standard telephones to party lines | |||
1983 | |||||
| 16 | 4406004 | Ring scheduling apparatus for a digital multiplexed telecommunication system | |||
| 17 | 4371756 | Bridge lifter module | |||
| 18 | 4371755 | Bridge lifter circuit | |||
| 19 | 4368358 | Loop sharing in digital systems | |||
1981 | |||||
| 20 | 4258230 | Party line telephone system | |||
1980 | |||||
| 21 | 4221935 | Control circuit for telephone subscriber station | |||
1979 | |||||
| 22 | 4168403 | Key telephone system comprising only one control lead per outside line | |||
| 23 | 4166931 | Miniature bridge lifter for telephone lines | |||
1978 | |||||
| 24 | 4109112 | Telephone isolation device | |||
1977 | |||||
| 25 | 4056694 | Telephone ringing detectors | |||
| 26 | 4048448 | Multiparty telephone ringing | |||
| 27 | 4021617 | Telephone ringer isolator | |||
1976 | |||||
| 28 | 3974342 | Switching arrangement for telecommunications systems | |||
| © 2017, ПАТ-Инфо, В.И. Карнышев
Дата формирования списка: 03.04.2017 | |||||