Inventor
SAKAI KEIJI
JP50 patents
⚠️ This page may combine multiple inventors who share the name “SAKAI KEIJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SHARP KK
19 patentsUS5502457AMar 26, 1996
Fiber optic face plate for a seamless modular display
SHARP KK77 citations96
US5465315ANov 7, 1995
Display apparatus having a plurality of display devices
SHARP KK76 citations96
US5013494AMay 7, 1991
Process for preparing blazed holograms
SHARP KK56 citations96
US6339562B1Jan 15, 2002
Optical pickup device
SHARP KK27 citations93
US5408264AApr 18, 1995
Three-dimensional image display apparatus for optically synthesizing images formed on different surfaces on a display screen
SHARP KK27 citations93
US5719834AFeb 17, 1998
Objective lens driving apparatus and method including visco-elastic support for a magnetic circuit which allows translation of the magnetic circuit without pivoting or rotating there of
SHARP KK36 citations92
US5279924AJan 18, 1994
Manufacturing method of optical diffraction grating element with serrated gratings having uniformly etched grooves
SHARP KK47 citations92
US6868055B2Mar 15, 2005
Optical pickup
SHARP KK26 citations91
US7483360B2Jan 27, 2009
Optical pickup device using polarizing hologram element and hologram laser therefor
SHARP KK8 citations83
US5509094AApr 16, 1996
Mode splitter and a magneto-optical disk pick-up device having the mode splitter
SHARP KK17 citations82
US6388977B1May 14, 2002
Hologram laser unit and optical pickup device including the same
SHARP KK9 citations74
US5576149ANov 19, 1996
Method for producing a tapered waveguide
SHARP KK11 citations74
US7019280B2Mar 28, 2006
Apparatus for detecting the tilt of a light reflector relative to the optical axis of input light
SHARP KK8 citations73
US5602808AFeb 11, 1997
Objective lens driving apparatus
SHARP KK16 citations73
US7106682B2Sep 12, 2006
Optical pickup
SHARP KK6 citations72
US7184384B2Feb 27, 2007
Optical pickup
SHARP KK6 citations62
US7136409B2Nov 14, 2006
Semiconductor laser device and optical pickup device
SHARP KK2 citations62
US7649825B2Jan 19, 2010
Splitting element, light emitter, and optical pickup apparatus
SHARP KK7 citations61
US7315502B2Jan 1, 2008
Light integration unit, optical pickup device using the unit, and optical disk device
SHARP KK4 citations60
HITACHI LTD
5 patentsUS6411377B1Jun 25, 2002
Optical apparatus for defect and particle size inspection
HITACHI LTD174 citations99
US7940383B2May 10, 2011
Method of detecting defects on an object
HITACHI LTD42 citations95
US7692779B2Apr 6, 2010
Apparatus and method for testing defects
HITACHI LTD12 citations92
US7639350B2Dec 29, 2009
Apparatus and method for testing defects
HITACHI LTD25 citations92
US7443496B2Oct 28, 2008
Apparatus and method for testing defects
HITACHI LTD16 citations92
KOBELCO CONSTR MACH CO LTD
3 patentsUS12195310B2Jan 14, 2025
Crane
KOBELCO CONSTR MACH CO LTD0 citations52
US11981542B2May 14, 2024
Hoisting implement, hoisting implement system, and method for using hoisting implement system
KOBELCO CONSTR MACH CO LTD0 citations43
US10053159B2Aug 21, 2018
Cabin support deck
KOBELCO CONSTR MACH CO LTD0 citations39
HITACHI HIGH TECH CORP
2 patentsLAUREL BANK MACHINE CO
2 patentsKAWASAKI STEEL CO
2 patentsUS6406558B1Jun 18, 2002
Method for manufacturing magnetic steel sheet having superior workability and magnetic properties
KAWASAKI STEEL CO14 citations82
US6428632B1Aug 6, 2002
Non-oriented electromagnetic steel sheet having reduced magnetic anisotropy in high frequency region and excellent press workability
KAWASAKI STEEL CO8 citations70