Inventor
OKA TAKAFUMI
JP17 patents
⚠️ This page may combine multiple inventors who share the name “OKA TAKAFUMI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
7 patentsUS5774742AJun 30, 1998
Peripheral device using two microprocessors and two buses for automatically updating program after judging that update data is stored in a portable recording medium
HITACHI LTD25 citations92
US4908793AMar 13, 1990
Storage apparatus including a semiconductor memory and a disk drive
HITACHI LTD50 citations92
US4775979AOct 4, 1988
Error correction system
HITACHI LTD41 citations92
US4698810AOct 6, 1987
Data recording and reproducing system with error correction capability using ECC and CRC codes
HITACHI LTD38 citations92
US4638472AJan 20, 1987
Information recording system and method for using alternative record area in writing and reading of data on optical disk
HITACHI LTD34 citations92
US5748967AMay 5, 1998
Program rewriting method and apparatus for multiprocessor system
HITACHI LTD9 citations73
US4160236AJul 3, 1979
Feedback shift register
HITACHI LTD10 citations73
MITSUBISHI ELECTRIC CORP
7 patentsUS7456039B1Nov 25, 2008
Method for manufacturing semiconductor optical device
MITSUBISHI ELECTRIC CORP11 citations84
US7751456B2Jul 6, 2010
Method for manufacturing semiconductor optical device
MITSUBISHI ELECTRIC CORP6 citations62
US7585688B2Sep 8, 2009
Method for manufacturing semiconductor optical device
MITSUBISHI ELECTRIC CORP4 citations62
US7611916B2Nov 3, 2009
Method of manufacturing semiconductor optical element
MITSUBISHI ELECTRIC CORP2 citations60
US11139638B2Oct 5, 2021
Static charge eliminator and static charge elimination method
MITSUBISHI ELECTRIC CORP0 citations53
US7897418B2Mar 1, 2011
Method for manufacturing semiconductor light emitting device
MITSUBISHI ELECTRIC CORP0 citations51
US7879684B2Feb 1, 2011
Method for manufacturing semiconductor light-emitting element
MITSUBISHI ELECTRIC CORP0 citations40