Inventor
HIRAI HIROMU
JP23 patents
⚠️ This page may combine multiple inventors who share the name “HIRAI HIROMU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
18 patentsUS5189578AFeb 23, 1993
Disk system with sub-actuators for fine head displacement
HITACHI LTD202 citations98
US5073912ADec 17, 1991
Sample moving apparatus, sample moving system and semiconductor manufacturing apparatus
HITACHI LTD88 citations96
US4667139AMay 19, 1987
Table device
HITACHI LTD109 citations94
US5666334ASep 9, 1997
Storage device capable of using both optical and magnetic disk units for storing information data
HITACHI LTD19 citations92
US5486965AJan 23, 1996
Rotary information recording/reproducing apparatus carriage actuator arrangement
HITACHI LTD25 citations92
US5404255AApr 4, 1995
Disk apparatus and its control method
HITACHI LTD34 citations92
US4525654AJun 25, 1985
Tape transport control unit
HITACHI LTD46 citations92
US5164931ANov 17, 1992
Method and apparatus for control of positioning
HITACHI LTD39 citations91
US4997177AMar 5, 1991
Method of and apparatus for conveying object by utilizing vibration
HITACHI LTD39 citations89
US4956789ASep 11, 1990
Method and apparatus for driving a servo system while suppressing residual vibration generated during position control
HITACHI LTD22 citations80
US4587469AMay 6, 1986
Electric servo system
HITACHI LTD24 citations80
US5301078AApr 5, 1994
Magnetic disk unit and manufacturing method of carriage structure thereof
HITACHI LTD17 citations73
US4430606AFeb 7, 1984
Sheet feeding apparatus
HITACHI LTD14 citations73
US4418305ANov 29, 1983
Velocity feedback circuit
HITACHI LTD10 citations73
US6181524B1Jan 30, 2001
Magnetic disk apparatus with slider and slider supporting mechanism including flexible section integrally formed from same material
HITACHI LTD8 citations71
US5229896AJul 20, 1993
Disk drive and method of controlling the same
HITACHI LTD19 citations70
US4297888ANov 3, 1981
Stability control system for vibration test device
HITACHI LTD19 citations70
US4280083AJul 21, 1981
Apparatus for limiting acceleration in a servosystem
HITACHI LTD15 citations70
HITACHI VIA MECHANICS LTD
3 patentsUS6703603B2Mar 9, 2004
Controller for optical scanner
HITACHI VIA MECHANICS LTD20 citations91
US7629714B2Dec 8, 2009
Rocking actuator and laser machining apparatus
HITACHI VIA MECHANICS LTD2 citations61
US7768225B2Aug 3, 2010
Servo control system for movable body, and laser drilling machine
HITACHI VIA MECHANICS LTD2 citations56