Inventor · disambiguated record
Masuo Kasai
Also filed as: KASAI MASUO
14 granted patents·381 citations·filing 1976–1993
94Inventor score
Top patents by PatentIndex Score
14 records- 0197US4866687AOptical disc access method and optical disk storage using coarse and fine actuatorsHITACHI LTD·Filed 1988·Granted Sep 12, 1989·100 cites·12 claims
- 0295US4970707AOptical tape apparatus with a tracking control mechanism and/or a focusing control mechanismHITACHI LTD·Filed 1988·Granted Nov 13, 1990·64 cites·26 claims
- 0386US4736353ADisc accessing using coarse and fine actuators with the fine actuator locked during coarse actuator movementHITACHI LTD·Filed 1986·Granted Apr 5, 1988·33 cites·20 claims
- 0485US4745587AEccentricity correction during optical head accessing of a desired trackHITACHI LTD·Filed 1986·Granted May 17, 1988·33 cites·10 claims
- 0580US5396477ALight spot positioning method and optical disc memory apparatus employing the sameHITACHI LTD·Filed 1989·Granted Mar 7, 1995·24 cites·43 claims
- 0678US5235591AStack type optical disc apparatus, sealed and separate type optical head therefor and optical disc mediumHITACHI LTD·Filed 1991·Granted Aug 10, 1993·27 cites·34 claims
- 0775US4731771ATracking servo setting method and apparatusMAEDA TAKESHI·Filed 1986·Granted Mar 15, 1988·22 cites·16 claims
- 0873US5511050AFocus error detecting method and optical head using the sameHITACHI LTD·Filed 1991·Granted Apr 23, 1996·21 cites·30 claims
- 0972US4095481AJoint mechanism of manipulatorHITACHI LTD·Filed 1976·Granted Jun 20, 1978·22 cites·14 claims
- 1058US5644554AMagnetic head load/unload device, method and a magneto-optical disk apparatus using the sameHITACHI LTD·Filed 1993·Granted Jul 1, 1997·11 cites·21 claims
- 1158US4710909APhase compensation apparatus for an optical information recording and reproducing systemHITACHI LTD·Filed 1985·Granted Dec 1, 1987·11 cites·9 claims
- 1249US5034941AOptical disk apparatus having auto-focusing servo systems for multiple light spots and method of starting the auto-focusing servo systemsHITACHI LTD·Filed 1989·Granted Jul 23, 1991·7 cites·22 claims
- 1338US4120042AMagnetic bubble information writing deviceHITACHI LTD·Filed 1976·Granted Oct 10, 1978·2 cites·8 claims
- 1435US5161046ABeam position control apparatusHITACHI KOKI KK·Filed 1991·Granted Nov 3, 1992·4 cites·6 claims
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