Inventor
MURANISHI MASARU
JP21 patents
⚠️ This page may combine multiple inventors who share the name “MURANISHI MASARU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
15 patentsUS6304527B1Oct 16, 2001
Near-field optical head and manufacturing method thereof and optical recording/readout system using near-field optical head
HITACHI LTD71 citations96
US6771460B2Aug 3, 2004
Spindle motor and magnetic disc device using thereof having radial and thrust bearings
HITACHI LTD23 citations92
US6469866B1Oct 22, 2002
Spindle motor and magnetic disc device with hydrodynamic bearing
HITACHI LTD16 citations92
US6356408B1Mar 12, 2002
Magnetic disk apparatus, including spindle motor having air flow passage in hub for pressure balance
HITACHI LTD30 citations92
US6243230B1Jun 5, 2001
Disk drive unit with hydrodynamic fluid bearing unit and disk device with said drive unit
HITACHI LTD19 citations92
US5481515AJan 2, 1996
Optical information storage medium control apparatus
HITACHI LTD38 citations92
US5448536ASep 5, 1995
Magneto-optical recording device having an optical head capable of generating a circularly polarized light beam
HITACHI LTD31 citations92
US6219472B1Apr 17, 2001
Optical switch, method of manufacturing same, and optical communication equipment using the same
HITACHI LTD41 citations91
US6369981B2Apr 9, 2002
Disk drive unit with hydrodynamic fluid bearing unit and disk device with said drive unit
HITACHI LTD13 citations74
US5781576AJul 14, 1998
Semiconductor laser device and optical disk drive
HITACHI LTD9 citations74
US6680814B2Jan 20, 2004
Spindle motor and magnetic disc device with hydrodynamic bearings
HITACHI LTD8 citations73
US5508805AApr 16, 1996
Interferometer, optical scanning type tunneling microscope and optical probe
HITACHI LTD10 citations73
US5404009AApr 4, 1995
Integrated optical information detector for an optical information processing apparatus with a plurality of photo detecting strips and a common bonding pad
HITACHI LTD10 citations73
US6487330B2Nov 26, 2002
Optical switch, method of manufacturing same, and optical communication equipment using same
HITACHI LTD8 citations72
US6369980B2Apr 9, 2002
Disk drive unit with hydrodynamic fluid bearing unit and disk device with said drive unit
HITACHI LTD1 citations63