Inventor
IIJIMA TETSUO
JP16 patents
⚠️ This page may combine multiple inventors who share the name “IIJIMA TETSUO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
8 patentsUS5642252AJun 24, 1997
Insulated gate semiconductor device and driving circuit device and electronic system both using the same
HITACHI LTD107 citations94
US6218889B1Apr 17, 2001
Semiconductor integrated circuit device, and method of manufacturing the same
HITACHI LTD31 citations92
US4831424AMay 16, 1989
Insulated gate semiconductor device with back-to-back diodes
HITACHI LTD36 citations92
US5502338AMar 26, 1996
Power transistor device having collector voltage clamped to stable level over wide temperature range
HITACHI LTD37 citations90
US5397914AMar 14, 1995
Power transistor device including power transistors in darlington connection and zener diode which is coupled between collector and base of power transistors and which is formed in polysilicon film
HITACHI LTD22 citations90
US5196354AMar 23, 1993
Method of manufacturing semiconductor device with controlled carrier lifetime
HITACHI LTD30 citations87
US4688323AAug 25, 1987
Method for fabricating vertical MOSFETs
HITACHI LTD9 citations73
US7482861B1Jan 27, 2009
Semiconductor integrated circuit device, and method of manufacturing the same
HITACHI LTD1 citations51
NIPPON TELEGRAPH & TELEPHONE
3 patentsUS6148536ANov 21, 2000
Two-fluid nozzle and device employing the same nozzle for freezing and drying liquid containing biological substances
NIPPON TELEGRAPH & TELEPHONE122 citations97
US5656498AAug 12, 1997
Freeze-dried blood cells, stem cells and platelets, and manufacturing method for the same
NIPPON TELEGRAPH & TELEPHONE107 citations96
US5051970ASep 24, 1991
Magneto-optic recording system with overwrite capability
NIPPON TELEGRAPH & TELEPHONE41 citations89