Inventor · disambiguated record
Hiroyuki Takewa
Also filed as: TAKEWA HIROYUKI
37 granted patents·1 pending application·851 citations·filing 1981–2013
98Inventor score
Files withMATSUSHITA ELECTRIC INDUSTRIAL CO LTD23TAKEWA HIROYUKI6PANASONIC CORP4FUJISE AKIKO1INABA ATSUSHI1
Top patents by PatentIndex Score
38 records- 0191US5025474ASpeaker system with image projection screenMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1988·Granted Jun 18, 1991·146 cites·18 claims
- 0288US5512715ASound absorberMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1994·Granted Apr 30, 1996·80 cites·6 claims
- 0385US8094864B2Diaphragm unit and speaker using the sameINABA ATSUSHI·Filed 2007·Granted Jan 10, 2012·14 cites·11 claims
- 0485US8031902B2LoudspeakerPANASONIC CORP·Filed 2005·Granted Oct 4, 2011·14 cites·19 claims
- 0585US6757404B2Loud speaker, diaphragm and process for making the diaphragmMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2001·Granted Jun 29, 2004·37 cites·18 claims
- 0684US7054459B2Surrounding structure of a loudspeakerMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2003·Granted May 30, 2006·34 cites·4 claims
- 0784US6973194B2SpeakerMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2004·Granted Dec 6, 2005·28 cites·3 claims
- 0882US7873179B2SpeakerPANASONIC CORP·Filed 2006·Granted Jan 18, 2011·11 cites·20 claims
- 0982US5664024ALoudspeakerMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1995·Granted Sep 2, 1997·83 cites·19 claims
- 1082US4751739AApparatus and method for controlling tone qualityMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1986·Granted Jun 14, 1988·33 cites·9 claims
- 1181US8542861B2Loudspeaker, video device, and portable information processing apparatusSAIKI SHUJI·Filed 2008·Granted Sep 24, 2013·9 cites·26 claims
- 1281US6700987B2LoudspeakerMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2001·Granted Mar 2, 2004·26 cites·15 claims
- 1375US9247349B2Loudspeaker, video device, and portable information processing apparatusPANASONIC IP MAN CO LTD·Filed 2013·Granted Jan 26, 2016·3 cites·17 claims
- 1475US6714655B2SpeakerMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2002·Granted Mar 30, 2004·16 cites·13 claims
- 1575US6655495B2Loudspeaker damper and loudspeakerMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2002·Granted Dec 2, 2003·18 cites·18 claims
- 1674US8553926B2Speaker and electronic deviceTAKEWA HIROYUKI·Filed 2009·Granted Oct 8, 2013·6 cites·13 claims
- 1773US6842529B2SpeakerMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2001·Granted Jan 11, 2005·17 cites·33 claims
- 1873US6836551B2LoudspeakerMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2001·Granted Dec 28, 2004·16 cites·62 claims
- 1972US4899390AThin speaker having an enclosure within an open portion and a closed portionMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1987·Granted Feb 6, 1990·44 cites·18 claims
- 2071US8428293B2Speaker deviceFUJISE AKIKO·Filed 2008·Granted Apr 23, 2013·5 cites·17 claims
- 2170US8422727B2Electro-acoustical transducerTAKEWA HIROYUKI·Filed 2008·Granted Apr 16, 2013·5 cites·12 claims
- 2270US8131002B2Electric-acoustic transducer and electronic deviceTAKEWA HIROYUKI·Filed 2006·Granted Mar 6, 2012·5 cites·9 claims
- 2368US8422723B2Loudspeaker and electronic device including loudspeakerTAKEWA HIROYUKI·Filed 2009·Granted Apr 16, 2013·4 cites·20 claims
- 2466US6747395B1Piezoelectric loudspeakerMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1999·Granted Jun 8, 2004·38 cites·17 claims
- 2563US5862242ASpeakerMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1996·Granted Jan 19, 1999·37 cites·16 claims
- 2661US8879776B2Speaker and electronic device using the speakerTAKEWA HIROYUKI·Filed 2012·Granted Nov 4, 2014·2 cites·15 claims
- 2761US7447328B2LoudspeakerMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2004·Granted Nov 4, 2008·7 cites·10 claims
- 2858US6305491B2SpeakerMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1999·Granted Oct 23, 2001·29 cites·16 claims
- 2951US5150418ASpeaker systemMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1991·Granted Sep 22, 1992·23 cites·2 claims
- 3050US6069965ALoudspeakerMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1997·Granted May 30, 2000·25 cites·19 claims
- 3149US5073946AThin speaker having an enclosure with an open portion and a closed portionMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1989·Granted Dec 17, 1991·19 cites·10 claims
- 3247US9106992B2Loudspeaker and electronic equipment including the loudspeakerPANASONIC CORP·Filed 2012·Granted Aug 11, 2015·0 cites·13 claims
- 3345US8363880B2Speaker and electronic device including the samePANASONIC CORP·Filed 2011·Granted Jan 29, 2013·0 cites·11 claims
- 3442US4353432AElectro-dynamic speakerMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1981·Granted Oct 12, 1982·9 cites·7 claims
- 3537US2012281869A1Speaker and acoustic equipment including the speakerTAKEWA HIROYUKI·Filed 2011·Application pending·0 cites
- 3635USD560213SDiaphragm for speakerMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2006·Granted Jan 22, 2008·2 cites·1 claims
- 3733US4484383AMethod of manufacturing a speaker diaphragmMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1982·Granted Nov 27, 1984·4 cites·1 claims
- 3830US4803242ADiaphragm for loudspeakersMATSUSHITA ELECTRIC INDUCTRIAL·Filed 1987·Granted Feb 7, 1989·2 cites·2 claims
Join the waitlist — get patent alerts
Get an alert when Hiroyuki Takewa files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →