Inventor · disambiguated record
Yoichi Tokai
Also filed as: TOKAI YOICHI
24 granted patents·3 pending applications·464 citations·filing 1989–2020
96Inventor score
Top patents by PatentIndex Score
27 records- 0186US5593517ARegenerating material and refrigerator using the sameTOSHIBA KK·Filed 1994·Granted Jan 14, 1997·47 cites·14 claims
- 0285US5186765ACold accumulating material and method of manufacturing the sameTOSHIBA KK·Filed 1990·Granted Feb 16, 1993·56 cites·10 claims
- 0384US6022486ARefrigerator comprising a refrigerant and heat regenerative materialTOSHIBA KK·Filed 1991·Granted Feb 8, 2000·46 cites·16 claims
- 0482US6045208AInk-jet recording device having an ultrasonic generating element arrayTOSHIBA KK·Filed 1995·Granted Apr 4, 2000·43 cites·34 claims
- 0578US4891992ATorque detecting apparatusTOSHIBA KK·Filed 1989·Granted Jan 9, 1990·34 cites·16 claims
- 0676US9680466B2Analog switch and multiplexerTOSHIBA KK·Filed 2015·Granted Jun 13, 2017·3 cites·20 claims
- 0776US5449416ACold accumulating material and method of manufacturing the sameTOSHIBA KK·Filed 1995·Granted Sep 12, 1995·36 cites·6 claims
- 0875US5447034ACryogenic refrigerator and regenerative heat exchange materialTOSHIBA KK·Filed 1993·Granted Sep 5, 1995·41 cites·30 claims
- 0973US5332029ARegeneratorTOSHIBA KK·Filed 1992·Granted Jul 26, 1994·35 cites·20 claims
- 1068US6696858B2Level-shifting circuitTOSHIBA KK·Filed 2001·Granted Feb 24, 2004·13 cites·14 claims
- 1167US9178428B2Step-down switching circuitTOSHIBA KK·Filed 2013·Granted Nov 3, 2015·2 cites·20 claims
- 1266US5110376ASuper-magnetostrictive alloyTOSHIBA KK·Filed 1991·Granted May 5, 1992·19 cites·7 claims
- 1364US5269854ARegenerative materialTOSHIBA KK·Filed 1992·Granted Dec 14, 1993·17 cites·19 claims
- 1461US5677617AMicro power supply device using switching elementTOSHIBA KK·Filed 1995·Granted Oct 14, 1997·28 cites·16 claims
- 1553US10903832B2Current drive circuitTOSHIBA KK·Filed 2019·Granted Jan 26, 2021·0 cites·15 claims
- 1649US8963522B2Current-direction detecting circuit and DC-DC converterOTSUKA MASAFUMI·Filed 2012·Granted Feb 24, 2015·1 cites·15 claims
- 1749US5223046ASuper-magnetostrictive alloyTOSHIBA KK·Filed 1992·Granted Jun 29, 1993·8 cites·8 claims
- 1846US5744943ACircuitry for supplying DC power to a small-size electronic apparatusTOSHIBA KK·Filed 1996·Granted Apr 28, 1998·14 cites·17 claims
- 1945US5190599AMagnetic memory and magnetic alloy thereofTOSHIBA KK·Filed 1990·Granted Mar 2, 1993·8 cites·6 claims
- 2045US2021298148A1Dc-dc power supply and light emitting deviceTOSHIBA KK·Filed 2020·Application pending·0 cites
- 2143US6336978B1Heat regenerative material formed of particles or filamentsTOSHIBA KK·Filed 1999·Granted Jan 8, 2002·9 cites·20 claims
- 2240US10128849B2Level shift circuit, semiconductor device, and battery supervisory apparatusTOSHIBA KK·Filed 2016·Granted Nov 13, 2018·0 cites·12 claims
- 2334US2011221415A1Dc/dc converterTOSHIBA KK·Filed 2011·Application pending·0 cites
- 2433US8207722B2DC/DC converterOTSUKA MASAFUMI·Filed 2009·Granted Jun 26, 2012·0 cites·20 claims
- 2532US8797007B2Semiconductor integrated circuit and DC-DC converterTOKAI YOICHI·Filed 2012·Granted Aug 5, 2014·0 cites·19 claims
- 2631US5224657ACryogenic refrigeratorTOSHIBA KK·Filed 1991·Granted Jul 6, 1993·4 cites·11 claims
- 2728US2002044171A1Ink-jet recording deviceFiled 1999·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →