Inventor · disambiguated record
Takao Koyama
Also filed as: KOYAMA TAKAO
29 granted patents·9 pending applications·564 citations·filing 1988–2023
97Inventor score
Top patents by PatentIndex Score
38 records- 0194US6401899B1Parking lock device and method for automatic transmissionNISSAN MOTOR·Filed 2000·Granted Jun 11, 2002·47 cites·9 claims
- 0292US6514382B1Process for producing bulky paperKAO CORP·Filed 1999·Granted Feb 4, 2003·99 cites·8 claims
- 0379US7520874B2Disposable diaper with improved leak prevention propertiesKAO CORP·Filed 2006·Granted Apr 21, 2009·19 cites·9 claims
- 0479US6706030B1Absorbent articleKAO CORP·Filed 2000·Granted Mar 16, 2004·86 cites·19 claims
- 0578US6409408B2Writing instrumentMITSUBISHI PENCIL CO·Filed 2001·Granted Jun 25, 2002·15 cites·11 claims
- 0678US5977211ABall point pen filled with erasable inkMITSUBISHI PENCIL CO·Filed 1998·Granted Nov 2, 1999·34 cites·6 claims
- 0776US7938814B2Disposable diaperKAO CORP·Filed 2008·Granted May 10, 2011·15 cites·24 claims
- 0876US7405865B2Liquid for electrophoretic display, display medium and display device using the sameMITSUBISHI PENCIL CO·Filed 2004·Granted Jul 29, 2008·17 cites·20 claims
- 0976US7156830B2Disposable diaper including lateral side coresKAO CORP·Filed 2005·Granted Jan 2, 2007·12 cites·4 claims
- 1073US4949821AAutomatic transmissionNISSAN MOTOR·Filed 1988·Granted Aug 21, 1990·23 cites·16 claims
- 1172US7811187B2Continuously variable transmissionNISSAN MOTOR·Filed 2005·Granted Oct 12, 2010·6 cites·20 claims
- 1272US5943374AOut-of-synchronization recovery method and apparatus of data transmission systemHITACHI ELECTRONICS·Filed 1996·Granted Aug 24, 1999·45 cites·23 claims
- 1370US7600938B2Refill for correction pen and refill unitMITSUBISHI PENCIL CO·Filed 2004·Granted Oct 13, 2009·13 cites·27 claims
- 1470US6517273B2Free-ink type writing instrumentMITSUBISHI PENCIL CO·Filed 2001·Granted Feb 11, 2003·12 cites·1 claims
- 1570US4974715AOil passages of torque converterNISSAN MOTOR·Filed 1989·Granted Dec 4, 1990·21 cites·6 claims
- 1666US7094227B2Disposable diaper having leg flap absorbent articlesKAO CORP·Filed 2003·Granted Aug 22, 2006·32 cites·14 claims
- 1763US2010074672A1Writing instrumentMITSUBISHI PENCIL CO·Filed 2009·Application pending·0 cites
- 1863US2024068992A1Ultrasonic inspection deviceYAMAHA FINE TECH CO LTD·Filed 2023·Application pending·0 cites
- 1959US8684617B2Writing instrumentKOYAMA TAKAO·Filed 2003·Granted Apr 1, 2014·5 cites·18 claims
- 2057US5487627ACounter sink drillMITSUBISHI MATERIALS CORP·Filed 1994·Granted Jan 30, 1996·17 cites·3 claims
- 2157US2022356062A1Glassy carbon compactMITSUBISHI PENCIL CO·Filed 2020·Application pending·0 cites
- 2255US2024085380A1Ultrasonic inspection deviceYAMAHA FINE TECH CO LTD·Filed 2023·Application pending·0 cites
- 2354US6878139B2Disposable diaper including lateral side coresKAO CORP·Filed 2001·Granted Apr 12, 2005·6 cites·7 claims
- 2454US6623393B2Drive belt for continuously variable transmissionNISSAN MOTOR·Filed 2002·Granted Sep 23, 2003·3 cites·7 claims
- 2550US5716434ANon-erasable pencil leadMITSUBISHI PENCIL CO·Filed 1996·Granted Feb 10, 1998·12 cites·12 claims
- 2648US7063475B2Ink-storing body for writing utensilMITSUBISHI PENCIL CO·Filed 2002·Granted Jun 20, 2006·2 cites·16 claims
- 2748US4863649AProcess for producing carbon heat generatorMITSUBISHI PENCIL CO·Filed 1988·Granted Sep 5, 1989·9 cites·4 claims
- 2845US8927845B2Electronic keyboard musical instrumentYAMAHA CORP·Filed 2014·Granted Jan 6, 2015·0 cites·11 claims
- 2944US2009253549A1Automatic transmissionNISSAN MOTOR·Filed 2009·Application pending·0 cites
- 3042US2006276293A1Split type continuously variable transmissionNISSAN MOTOR·Filed 2006·Application pending·0 cites
- 3141US2004078017A1Disposable diaperFiled 2002·Application pending·0 cites
- 3239US5944438AWriting instrumentMITSUBISHI PENCIL CO·Filed 1998·Granted Aug 31, 1999·5 cites·3 claims
- 3339US2008261766A1Automatic TransmissionNISSAN MOTOR·Filed 2005·Application pending·0 cites
- 3439US2018202512A1Vibratory structureYAMAHA CORP·Filed 2018·Application pending·0 cites
- 3538US6443649B1Free-ink type writing instrumentMITSUBISHI PENCIL CO·Filed 2001·Granted Sep 3, 2002·0 cites·1 claims
- 3636US5178908AProcess for coating carbonized material with metalMITSUBISHI PENCIL CO·Filed 1990·Granted Jan 12, 1993·5 cites·1 claims
- 3731US4916899AStator shaft connection through oil pump of automatic transmissionNISSAN MOTOR·Filed 1988·Granted Apr 17, 1990·1 cites·6 claims
- 3825US5755565ARotary pump having reinforcing wall in a passageNISSAN MOTOR·Filed 1997·Granted May 26, 1998·3 cites·3 claims
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