Inventor · disambiguated record
Hiromu Hirai
Also filed as: HIRAI HIROMU
23 granted patents·774 citations·filing 1979–2009
96Inventor score
Top patents by PatentIndex Score
23 records- 0197US5189578ADisk system with sub-actuators for fine head displacementHITACHI LTD·Filed 1990·Granted Feb 23, 1993·202 cites·5 claims
- 0293US4525654ATape transport control unitHITACHI LTD·Filed 1982·Granted Jun 25, 1985·46 cites·11 claims
- 0392US4667139ATable deviceHITACHI LTD·Filed 1985·Granted May 19, 1987·109 cites·5 claims
- 0489US5073912ASample moving apparatus, sample moving system and semiconductor manufacturing apparatusHITACHI LTD·Filed 1989·Granted Dec 17, 1991·88 cites·18 claims
- 0583US5404255ADisk apparatus and its control methodHITACHI LTD·Filed 1993·Granted Apr 4, 1995·34 cites·22 claims
- 0683US5164931AMethod and apparatus for control of positioningHITACHI LTD·Filed 1991·Granted Nov 17, 1992·39 cites·7 claims
- 0783US4997177AMethod of and apparatus for conveying object by utilizing vibrationHITACHI LTD·Filed 1988·Granted Mar 5, 1991·39 cites·16 claims
- 0877US6703603B2Controller for optical scannerHITACHI VIA MECHANICS LTD·Filed 2001·Granted Mar 9, 2004·20 cites·10 claims
- 0977US5486965ARotary information recording/reproducing apparatus carriage actuator arrangementHITACHI LTD·Filed 1994·Granted Jan 23, 1996·25 cites·39 claims
- 1069US4587469AElectric servo systemHITACHI LTD·Filed 1982·Granted May 6, 1986·24 cites·10 claims
- 1167US5301078AMagnetic disk unit and manufacturing method of carriage structure thereofHITACHI LTD·Filed 1991·Granted Apr 5, 1994·17 cites·20 claims
- 1266US5666334AStorage device capable of using both optical and magnetic disk units for storing information dataHITACHI LTD·Filed 1995·Granted Sep 9, 1997·19 cites·3 claims
- 1366US5229896ADisk drive and method of controlling the sameHITACHI LTD·Filed 1991·Granted Jul 20, 1993·19 cites·21 claims
- 1464US4430606ASheet feeding apparatusHITACHI LTD·Filed 1981·Granted Feb 7, 1984·14 cites·10 claims
- 1562US7768225B2Servo control system for movable body, and laser drilling machineHITACHI VIA MECHANICS LTD·Filed 2005·Granted Aug 3, 2010·2 cites·3 claims
- 1662US4956789AMethod and apparatus for driving a servo system while suppressing residual vibration generated during position controlHITACHI LTD·Filed 1988·Granted Sep 11, 1990·22 cites·12 claims
- 1762US4297888AStability control system for vibration test deviceHITACHI LTD·Filed 1980·Granted Nov 3, 1981·19 cites·3 claims
- 1861US4280083AApparatus for limiting acceleration in a servosystemHITACHI LTD·Filed 1979·Granted Jul 21, 1981·15 cites·4 claims
- 1959US7629714B2Rocking actuator and laser machining apparatusHITACHI VIA MECHANICS LTD·Filed 2007·Granted Dec 8, 2009·2 cites·4 claims
- 2045US8452424B2Moving object feed-forward control methodHIROSE NORIAKI·Filed 2009·Granted May 28, 2013·1 cites·2 claims
- 2145US6181524B1Magnetic disk apparatus with slider and slider supporting mechanism including flexible section integrally formed from same materialHITACHI LTD·Filed 1995·Granted Jan 30, 2001·8 cites·28 claims
- 2245US4418305AVelocity feedback circuitHITACHI LTD·Filed 1981·Granted Nov 29, 1983·10 cites·5 claims
- 2344US8872064B2Positioning control system for moving element and laser drilling machineONO TAKASHI·Filed 2007·Granted Oct 28, 2014·0 cites·14 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →