Inventor
OHTOSHI TSUKURU
JP24 patents
⚠️ This page may combine multiple inventors who share the name “OHTOSHI TSUKURU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
18 patentsUS5119393AJun 2, 1992
Semiconductor laser device capable of controlling wavelength shift
HITACHI LTD81 citations96
US6542526B1Apr 1, 2003
Optical information processor and semiconductor light emitting device suitable for the same
HITACHI LTD40 citations92
US5177758AJan 5, 1993
Semiconductor laser device with plural active layers and changing optical properties
HITACHI LTD54 citations92
US5132981AJul 21, 1992
Semiconductor optical device
HITACHI LTD31 citations92
US4835578AMay 30, 1989
Semiconductor device having a quantum wire and a method of producing the same
HITACHI LTD26 citations92
US6635908B2Oct 21, 2003
Burying type avalanche photodiode and fabrication method thereof
HITACHI LTD43 citations91
US5543629AAug 6, 1996
Superlattice avalanche photodiode (APD)
HITACHI LTD30 citations90
US5042049AAug 20, 1991
Semiconductor optical device
HITACHI LTD19 citations82
US4881235ANov 14, 1989
Semiconductor laser having a multiple quantum well structure doped with impurities
HITACHI LTD21 citations81
US5073892ADec 17, 1991
Semiconductor laser device
HITACHI LTD11 citations74
US4602371AJul 22, 1986
High output semiconductor laser device utilizing a mesa-stripe optical confinement region
HITACHI LTD11 citations74
US5136601AAug 4, 1992
Semiconductor laser
HITACHI LTD8 citations73
US5299217AMar 29, 1994
Semiconductor light-emitting device with cadmium zinc selenide layer
HITACHI LTD16 citations72
US5324959AJun 28, 1994
Semiconductor optical device having a heterointerface therein
HITACHI LTD14 citations71
US5170404ADec 8, 1992
Semiconductor laser device suitable for optical communications systems drive
HITACHI LTD5 citations63
US4563764AJan 7, 1986
Semiconductor laser device
HITACHI LTD3 citations62
US8369913B2Feb 5, 2013
Optical measurement instrument for living body semiconductor laser installation for living body light measuring device
HITACHI LTD3 citations61
US7668217B2Feb 23, 2010
Semiconductor laser diode device
HITACHI LTD0 citations51