Inventor · disambiguated record
Wasao Takasugi
Also filed as: TAKASUGI WASAO
28 granted patents·1,653 citations·filing 1977–2002
98Inventor score
Top patents by PatentIndex Score
28 records- 0199US4866692AMethod and apparatus for information recording and reproduction of a pit-shape-forming optical recording typeHITACHI LTD·Filed 1987·Granted Sep 12, 1989·153 cites·18 claims
- 0296US6837438B1Non-contact information medium and communication system utilizing the sameHITACHI MAXELL·Filed 1999·Granted Jan 4, 2005·292 cites·9 claims
- 0395US4646103AOptical recording methodHITACHI LTD·Filed 1986·Granted Feb 24, 1987·63 cites·4 claims
- 0495US4507767AControl circuit for controlling light source in optical disc deviceHITACHI LTD·Filed 1983·Granted Mar 26, 1985·50 cites·3 claims
- 0595US4450547AFocal position detecting optical apparatusHITACHI LTD·Filed 1981·Granted May 22, 1984·53 cites·20 claims
- 0694US5295485AUltrasonic diagnostic systemHITACHI LTD·Filed 1992·Granted Mar 22, 1994·225 cites·20 claims
- 0791US6482495B1Information carrier and process for production thereofHITACHI MAXELL·Filed 1997·Granted Nov 19, 2002·71 cites·12 claims
- 0891US6344824B1Noncontact communication semiconductor deviceHITACHI MAXELL·Filed 1999·Granted Feb 5, 2002·109 cites·6 claims
- 0991US4835759AMethod and apparatus for compensating variation of read data in an optical data storageHITACHI LTD·Filed 1986·Granted May 30, 1989·43 cites·5 claims
- 1089US4785442ALight spot position control system and method by sampling servoHITACHI LTD·Filed 1987·Granted Nov 15, 1988·38 cites·7 claims
- 1189US4392219AMethod and device for recording and reproducing tracking informationHITACHI LTD·Filed 1981·Granted Jul 5, 1983·33 cites·10 claims
- 1288US5574273ANon-contact system parallel data transfer systemHITACHI MAXELL·Filed 1994·Granted Nov 12, 1996·113 cites·31 claims
- 1387US6926794B2Information carrier and process for production thereofHITACHI MAXELL·Filed 2002·Granted Aug 9, 2005·32 cites·6 claims
- 1487US4564929AInformation recording and reproducing apparatus with tracking control by samplingHITACHI LTD·Filed 1982·Granted Jan 14, 1986·30 cites·14 claims
- 1582US5418353ANon-contact, electromagnetically coupled transmission and receiving system for IC cardsHITACHI MAXELL·Filed 1994·Granted May 23, 1995·87 cites·14 claims
- 1681US4282551APCM Recording and reproducing apparatusHITACHI LTD·Filed 1980·Granted Aug 4, 1981·23 cites·7 claims
- 1780US4748611AInformation recording medium and method for reproducing the sameHITACHI LTD·Filed 1986·Granted May 31, 1988·29 cites·2 claims
- 1879US5856662AInformation carrier and process for producing sameHITACHI MAXELL·Filed 1996·Granted Jan 5, 1999·71 cites·34 claims
- 1978US4949325AMethod and associated apparatus and medium for optical recording and reproducing informationHITACHI LTD·Filed 1988·Granted Aug 14, 1990·22 cites·13 claims
- 2074US4872152ALight spot position control system and method by sampled servoHITACHI LTD·Filed 1987·Granted Oct 3, 1989·18 cites·8 claims
- 2168US4177394AComparator circuit having multi-functionsHITACHI LTD·Filed 1977·Granted Dec 4, 1979·11 cites·13 claims
- 2261US4817066ATransmitter/receiver for ultrasonic diagnostic systemHITACHI LTD·Filed 1986·Granted Mar 28, 1989·22 cites·5 claims
- 2355US4258330ADifferential current amplifierHITACHI LTD·Filed 1979·Granted Mar 24, 1981·7 cites·15 claims
- 2453US6786407B1Reader and system for noncontact type information storage mediumHITACHI MAXELL·Filed 1999·Granted Sep 7, 2004·17 cites·8 claims
- 2547US4735211AUltrasonic measurement apparatusHITACHI LTD·Filed 1986·Granted Apr 5, 1988·32 cites·5 claims
- 2639US4847822AOptical information recording and reproducing apparatus with tracking control by samplingHITACHI LTD·Filed 1987·Granted Jul 11, 1989·4 cites·10 claims
- 2736USRE35435EMethod and apparatus for information recording and reproduction of a pit-shape-forming optical recording typeHITACHI LTD·Filed 1991·Granted Jan 28, 1997·2 cites·19 claims
- 2834US4680498AInput circuit in ultrasonic apparatusHITACHI LTD·Filed 1986·Granted Jul 14, 1987·3 cites·6 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →