Inventor · disambiguated record
Akira Usui
Also filed as: USUI AKIRA
58 granted patents·9 pending applications·1,852 citations·filing 1981–2018
99Inventor score
Top patents by PatentIndex Score
67 records- 0196US6252261B1GaN crystal film, a group III element nitride semiconductor wafer and a manufacturing process thereforNEC CORP·Filed 1999·Granted Jun 26, 2001·319 cites·61 claims
- 0296US4409776AMethod and apparatus for packing articles with composite stretched filmsSHINWA KAGAKU KOGYO KK·Filed 1981·Granted Oct 18, 1983·152 cites·12 claims
- 0395US6924159B2Semiconductor substrate made of group III nitride, and process for manufacture thereofHITACHI CABLE·Filed 2002·Granted Aug 2, 2005·113 cites·37 claims
- 0495US6348096B1Method for manufacturing group III-V compound semiconductorsNEC CORP·Filed 1998·Granted Feb 19, 2002·214 cites·27 claims
- 0593US7082094B2Optical recording apparatus with drawing capability of visible image on disk faceYAMAHA CORP·Filed 2002·Granted Jul 25, 2006·38 cites·3 claims
- 0693US6555845B2Method for manufacturing group III-V compound semiconductorsNEC CORP·Filed 2001·Granted Apr 29, 2003·67 cites·3 claims
- 0792US5469806AMethod for epitaxial growth of semiconductor crystal by using halogenideNEC CORP·Filed 1993·Granted Nov 28, 1995·121 cites·2 claims
- 0890US8345883B2Audio playback method and apparatus using line array speaker unitYAMAHA CORP·Filed 2006·Granted Jan 1, 2013·24 cites·17 claims
- 0985US7196399B2Epitaxially grown nitride-based compound semiconductor crystal substrate structure with low dislocation densityHITACHI CABLE·Filed 2004·Granted Mar 27, 2007·29 cites·16 claims
- 1084US8308532B2Abrasive articleUSUI AKIRA·Filed 2010·Granted Nov 13, 2012·7 cites·4 claims
- 1184US7189588B2Group III nitride semiconductor substrate and its manufacturing methodHITACHI CABLE·Filed 2003·Granted Mar 13, 2007·30 cites·33 claims
- 1284US6812051B2Method of forming an epitaxially grown nitride-based compound semiconductor crystal substrate structure and the same substrate structureNEC CORP·Filed 2002·Granted Nov 2, 2004·26 cites·51 claims
- 1384US5553042AOptical disk recording deviceYAMAHA CORP·Filed 1994·Granted Sep 3, 1996·34 cites·15 claims
- 1480US5014349ATelevision tuner for common use in BS/UVMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1988·Granted May 7, 1991·41 cites·5 claims
- 1579US4680602ALight emitting diodeNEC CORP·Filed 1984·Granted Jul 14, 1987·37 cites·14 claims
- 1676US7097920B2Group III nitride based semiconductor substrate and process for manufacture thereofHITACHI CABLE·Filed 2003·Granted Aug 29, 2006·16 cites·16 claims
- 1776US5526333AOptical disk recording deviceYAMAHA CORP·Filed 1994·Granted Jun 11, 1996·25 cites·12 claims
- 1876US4861941AShielding deviceMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1987·Granted Aug 29, 1989·34 cites·8 claims
- 1975US7339863B2Method of recording information on optical disks at a recording density proportional to the actual information volume and disk nominal capacityYAMAHA CORP·Filed 2005·Granted Mar 4, 2008·2 cites·11 claims
- 2075US6183677B1Method of manufacturing abrasive sheet with thin resin filmKOVAX CORP·Filed 1999·Granted Feb 6, 2001·42 cites·2 claims
- 2175US5355532ATelevision tuner unit having shield housingMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1993·Granted Oct 11, 1994·43 cites·9 claims
- 2275US5179729ATuner station selecting apparatusMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1990·Granted Jan 12, 1993·41 cites·1 claims
- 2374US6667252B2Method of manufacturing compound semiconductor substrateSONY CORP·Filed 2002·Granted Dec 23, 2003·16 cites·5 claims
- 2471US4866648ADigital filterYAMAHA CORP·Filed 1987·Granted Sep 12, 1989·18 cites·6 claims
- 2570US6395239B1OzonizerMITSUBISHI ELECTRIC CORP·Filed 2000·Granted May 28, 2002·10 cites·16 claims
- 2669US7829913B2Porous substrate and its manufacturing method, and gan semiconductor multilayer substrate and its manufacturing methodHITACHI CABLE·Filed 2003·Granted Nov 9, 2010·15 cites·13 claims
- 2769US7463295B2Characteristic correction apparatus for gamma correcting an image based on the image typePANASONIC CORP·Filed 2003·Granted Dec 9, 2008·9 cites·16 claims
- 2869US5902393AMethod for growing p-type gallium nitride based compound semiconductors by vapor phase epitaxyNEC CORP·Filed 1997·Granted May 11, 1999·47 cites·13 claims
- 2966US7046597B2Optical disk apparatus for recording information at a recording density proportional to the actual information volume and disk nominal capacityYAMAHA CORP·Filed 2002·Granted May 16, 2006·5 cites·2 claims
- 3065US4817195AChannel selection apparatus having automatic frequency compensation for transmission frequency errorMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1987·Granted Mar 28, 1989·22 cites·4 claims
- 3165US4764736AAmplifier for high frequency signalMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1985·Granted Aug 16, 1988·15 cites·3 claims
- 3264US7580530B2Audio characteristic correction systemYAMAHA CORP·Filed 2004·Granted Aug 25, 2009·8 cites·5 claims
- 3363US6345388B1Method and apparatus for transmitting and receiving television signalMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1997·Granted Feb 5, 2002·27 cites·30 claims
- 3463US4694293AData transmission systemNIPPON MUSICAL INSTRUMENTS MFG·Filed 1985·Granted Sep 15, 1987·28 cites·14 claims
- 3562US7496023B2Method, program and system of forming visual image on optical diskYAMAHA CORP·Filed 2003·Granted Feb 24, 2009·4 cites·57 claims
- 3662US5598447AIntegrated circuit device having internal fast clock sourceYAMAHA CORP·Filed 1993·Granted Jan 28, 1997·21 cites·14 claims
- 3759US6335763B1Television receiver and additional information transmitting methodMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1997·Granted Jan 1, 2002·21 cites·4 claims
- 3858US6577347B2Television receiver and additional information transmitting methodMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2001·Granted Jun 10, 2003·3 cites·5 claims
- 3958US5101369ADigital filter capable of sample rate alterationYAMAHA CORP·Filed 1989·Granted Mar 31, 1992·13 cites·5 claims
- 4058US2007153646A1Optical Recording Apparatus With Drawing Capability of Visible Image on Disk FaceYAMAHA CORP·Filed 2007·Application pending·0 cites
- 4157US7535809B2Optical recording apparatus with drawing capability of visible image on disk faceYAMAHA CORP·Filed 2006·Granted May 19, 2009·0 cites·54 claims
- 4257US4677692AFrequency conversion apparatusMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1985·Granted Jun 30, 1987·15 cites·16 claims
- 4355US7656779B2Method for forming visible images on optical recording mediumYAMAHA CORP·Filed 2004·Granted Feb 2, 2010·2 cites·12 claims
- 4454US7012864B2Optical disk recorder for writing data with variable densityYAMAHA CORP·Filed 2004·Granted Mar 14, 2006·2 cites·7 claims
- 4553US4806876AHigh frequency amplifier circuitMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1987·Granted Feb 21, 1989·10 cites·6 claims
- 4652US4751475ALocal oscillation apparatusMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1986·Granted Jun 14, 1988·12 cites·7 claims
- 4751US2007157225A1Method and apparatus for receiving and displaying coupon informationMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2006·Application pending·0 cites
- 4850US6980495B2Optical recording apparatus with interleaving blank rounds into spiral trackYAMAHA CORP·Filed 2003·Granted Dec 27, 2005·2 cites·8 claims
- 4950US5203032AStation selecting apparatusMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1990·Granted Apr 13, 1993·15 cites·3 claims
- 5050US5093922AReceiving apparatus for receiving a bs-if signal converted into a superhigh band or uhf bandMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1988·Granted Mar 3, 1992·10 cites·2 claims
Showing the top 50 of 67 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →