Inventor · disambiguated record
Fumikazu Hamatani
Also filed as: HAMATANI FUMIKAZU · KERMAN STEPHEN E
8 granted patents·153 citations·filing 1976–1991
86Inventor score
Top patents by PatentIndex Score
8 records- 0183US4740955ACommunications system having voice and digital data capability and employing a plurality of voice and data buses in main service unit and serial packetized transmission to and from telephonesTIE COMMUNICATIONS·Filed 1986·Granted Apr 26, 1988·101 cites·19 claims
- 0249US4341927AData transmission apparatusTIE COMMUNICATIONS·Filed 1980·Granted Jul 27, 1982·14 cites·8 claims
- 0347US4536619ARinging signal detection circuitNITSUKO LTD·Filed 1983·Granted Aug 20, 1985·10 cites·8 claims
- 0446US4185173AKey telephone call signalling circuitNITSUKO LTD·Filed 1978·Granted Jan 22, 1980·5 cites·4 claims
- 0545US5182768ADigital telephone set capable of being simultaneously used by a plurality of persons by using one transmission lineNITSUKO LTD·Filed 1991·Granted Jan 26, 1993·15 cites·3 claims
- 0640US4081625AControl circuitry for key telephone apparatusNITSUKO LTD·Filed 1976·Granted Mar 28, 1978·5 cites·8 claims
- 0735US4087649APulse counting circuitNITSUKO LTD·Filed 1976·Granted May 2, 1978·2 cites·2 claims
- 0832US4087644ADial impulse relay circuitNITSUKO LTD·Filed 1976·Granted May 2, 1978·1 cites·2 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →