Inventor
OKITA YOSHIHISA
JP15 patents
⚠️ This page may combine multiple inventors who share the name “OKITA YOSHIHISA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
TDK CORP
10 patentsUS6323634B1Nov 27, 2001
Magnetic sensor apparatus, current sensor apparatus and magnetic sensor element
TDK CORP103 citations97
US6316931B1Nov 13, 2001
Magnetic sensor apparatus and current sensor apparatus
TDK CORP104 citations97
US6154379ANov 28, 2000
Electric power conversion device
TDK CORP146 citations97
US6172882B1Jan 9, 2001
Partial resonance PWM converter
TDK CORP59 citations96
US6438004B1Aug 20, 2002
Power conversion apparatus utilizing soft switching resonant snubber circuitry
TDK CORP20 citations84
US6353543B2Mar 5, 2002
Switching circuit of power conversion apparatus
TDK CORP16 citations84
US6351107B1Feb 26, 2002
Driving device of switching element in power conversion device using current control semiconductor switching element
TDK CORP18 citations83
US6614667B1Sep 2, 2003
Method and apparatus for driving switching element in power converter
TDK CORP2 citations62
US6414854B2Jul 2, 2002
Driving device and method of switching element in power conversion apparatus using current-controlled semiconductor switching element
TDK CORP5 citations62
US6208541B1Mar 27, 2001
PWM inverter apparatus
TDK CORP6 citations62
OKI ELECTRIC IND CO LTD
5 patentsUS5219768AJun 15, 1993
Method for fabricating a semiconductor device
OKI ELECTRIC IND CO LTD10 citations73
US4974045ANov 27, 1990
Bi-polar transistor structure
OKI ELECTRIC IND CO LTD17 citations73
US4866000ASep 12, 1989
Fabrication method for semiconductor integrated circuits
OKI ELECTRIC IND CO LTD16 citations73
US5234844AAug 10, 1993
Process for forming bipolar transistor structure
OKI ELECTRIC IND CO LTD5 citations62
US4749663AJun 7, 1988
Process of fabricating a semiconductor IC involving simultaneous sputter etching and deposition
OKI ELECTRIC IND CO LTD6 citations62