Inventor · disambiguated record
Seijiro Ishizuka
Also filed as: ISHIZUKA SEIJIRO
7 granted patents·292 citations·filing 1991–2004
88Inventor score
Files withSONY CORP7
Top patents by PatentIndex Score
7 records- 0180US6052567APortable radio apparatus with coaxial antenna feeder in microphone armSONY CORP·Filed 1998·Granted Apr 18, 2000·62 cites·12 claims
- 0275US5805666AMethod of and apparatus for diagnosing personal communication systemSONY CORP·Filed 1996·Granted Sep 8, 1998·80 cites·16 claims
- 0370US6101391AMobile telephone system which sends a mobile's positional data to certain nearby mobilesSONY CORP·Filed 1998·Granted Aug 8, 2000·80 cites·16 claims
- 0463US5276914ADual-mode transceiver that switches out a large insertion loss filter during transmissionSONY CORP·Filed 1991·Granted Jan 4, 1994·36 cites·10 claims
- 0553US7221923B2Receiving apparatusSONY CORP·Filed 2004·Granted May 22, 2007·6 cites·3 claims
- 0644US5862181ATransmitting receiving apparatusSONY CORP·Filed 1995·Granted Jan 19, 1999·17 cites·1 claims
- 0740US5930245ARadio telephone apparatus for performing space diversity reception to communicate with base stations in a TDMA radio communication systemSONY CORP·Filed 1996·Granted Jul 27, 1999·11 cites·18 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →