Inventor · disambiguated record
Koichi Hirama
Also filed as: HIRAMA KOICHI
7 granted patents·6 pending applications·19 citations·filing 1985–2017
78Inventor score
Top patents by PatentIndex Score
13 records- 0179US7893784B2Composite resonance circuit and oscillation circuit using the circuitHIRAMA KOICHI·Filed 2005·Granted Feb 22, 2011·11 cites·28 claims
- 0255US9401695B2Immittance conversion circuit and filterMARCDEVICES CO LTD·Filed 2013·Granted Jul 26, 2016·2 cites·10 claims
- 0348US8179209B2Complex resonance circuitHIRAMA KOICHI·Filed 2007·Granted May 15, 2012·2 cites·10 claims
- 0440US2011043080A1Complex resonance circuit and oscillation circuit using the sameHIRAMA KOICHI·Filed 2010·Application pending·0 cites
- 0536US10782329B2Phase analysis circuitMARCDEVICES CO LTD·Filed 2017·Granted Sep 22, 2020·0 cites·11 claims
- 0636US2016294055A1Transfer-function copying circuit and gang-controlled phase displacement circuitMARCDEVICES CO LTD·Filed 2013·Application pending·0 cites
- 0732US8264263B2Quasi-resonant composite resonance circuitHIRAMA KOICHI·Filed 2010·Granted Sep 11, 2012·0 cites·4 claims
- 0832US2012223782A1Complex negative feedback frequency selection output circuit and oscillation circuit using the sameHIRAMA KOICHI·Filed 2011·Application pending·0 cites
- 0928US2013027148A1Antiresonant frequency-varying complex resonant circuitMARCDEVICES CO LTD·Filed 2011·Application pending·0 cites
- 1028US2013027143A1Antiresonant frequency-varying complex resonance circuitMARCDEVICES CO LTD·Filed 2011·Application pending·0 cites
- 1127US2011148514A1Frequency variable composite resonance circuitMARCDEVICES CO LTD·Filed 2010·Application pending·0 cites
- 1226US6057629APiezoelectric vibrator for suppressing harmonic vibrations of lower ordersKIYOSHI NAKAMURA·Filed 1998·Granted May 2, 2000·3 cites·5 claims
- 1321US4703657AGas pressure sensorTOYO COMMUNICATION EQUIP·Filed 1985·Granted Nov 3, 1987·1 cites·7 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →