Inventor
NAGAI MASAICHI
JP13 patents
Patents
13 patentsUS4651172AMar 17, 1987
Information recording medium
HITACHI LTD78 citations95
US5484686AJan 16, 1996
Optical recording media and information recording and reproducing units
HITACHI LTD21 citations92
US5475656ADec 12, 1995
Optical disk memory and information processing apparatus
HITACHI LTD25 citations92
US5420845AMay 30, 1995
Methods of varying optical properties, optical devices, information recording media and information recording methods and apparatuses
HITACHI LTD39 citations92
US5371730ADec 6, 1994
Optical memory and information processing apparatus
HITACHI LTD23 citations92
US5317556AMay 31, 1994
Information processing apparatus and optical head incorporated therein
HITACHI LTD21 citations92
US5187052AFeb 16, 1993
Optical recording medium
HITACHI LTD23 citations92
US6127210AOct 3, 2000
Manufacturing method of CMOS thin film semiconductor device and CMOS thin film semiconductor device manufactured thereby
HITACHI LTD25 citations91
US5572502ANov 5, 1996
Optical disk apparatus
HITACHI LTD38 citations91
US5583840ADec 10, 1996
ROM type optical recording medium with a high reflectivity and an optical head operable on ROM, write-one and rewritable disk
HITACHI LTD14 citations73
US5274612ADec 28, 1993
Information processor and disk memory used in the same
HITACHI LTD13 citations73
US4668591AMay 26, 1987
Magnetic separator matrix of cut pieces of an elongated crystalline magnetic alloy
HITACHI LTD8 citations70
USRE36624EMar 21, 2000
Optical recording media and information recording and reproducing units
HITACHI LTD3 citations62