NK

Naoki Kumagai

FC Fuji Electric Co.: 36 patents #29 of 2,643Top 2%
FC Fuji Electric Device Technology Co.: 4 patents #12 of 205Top 6%
HI Hitachi: 2 patents #13,388 of 28,497Top 50%
AM Amp: 2 patents #506 of 1,260Top 45%
PK Paloma Kogyo Kabushiki Kaisha: 1 patents #14 of 30Top 50%
W& Whitaker &: 1 patents #650 of 1,437Top 50%
YC Yamato Scientific Co.: 1 patents #11 of 40Top 30%
Overall (All Time): #60,693 of 4,157,543Top 2%
47
Patents All Time

Issued Patents All Time

Showing 26–47 of 47 patents

Patent #TitleCo-InventorsDate
6501814 Dry radioactive substance storage facility Masashi Shimizu, Koichi Maki, Keiichiro Shibata, Masashi Oda, Hidetoshi Kanai 2002-12-31
6430248 Dry radioactive substance storage facility Masashi Shimizu, Koichi Maki, Keiichiro Shibata, Masashi Oda, Hidetoshi Kanai 2002-08-06
6326831 Level shift circuit 2001-12-04
6323539 High voltage integrated circuit, high voltage junction terminating structure, and high voltage MIS transistor Tatsuhiko Fujihira, Yukio Yano, Shigeyuki Obinata 2001-11-27
6124628 High voltage integrated circuit, high voltage junction terminating structure, and high voltage MIS transistor Tatsuhiko Fujihira, Yukio Yano, Shigeyuki Obinata 2000-09-26
5925900 Emitter-switched thyristor having a floating ohmic contact Gehan Anil Joseph Amaratunga, Wei-Zhong Chen 1999-07-20
5896043 Level shift circuit 1999-04-20
5844760 Insulated-gate controlled semiconductor device Katsunori Ueno 1998-12-01
5744830 Semiconductor device Sankaranarayanan Ekkanath-Madathil, Qin Huang, Gehan Anil Joseph Amaratunga 1998-04-28
5585650 Semiconductor bidirectional switch and method of driving the same 1996-12-17
5477077 Semiconductor device and a method for the manufacture thereof Katsunori Ueno 1995-12-19
5475333 Built-in drive power-source semiconductor device 1995-12-12
5430323 Injection control-type Schottky barrier rectifier Tomoyuki Yamazaki 1995-07-04
5380190 Pulse combustor 1995-01-10
5374203 Edge connector and board latching device for a connector Yoshio Sato, Takashi Kamono, Ryoji Nishimura, Tsutomi Nakamura 1994-12-20
5304802 Semiconductor device including overvoltage protective circuit 1994-04-19
5303110 Insulated-gate controlled semiconductor device 1994-04-12
5092959 Organic solvent spray dryer device Takeshi Orii, Yukio Suzuki, Tamotsu Konishi, Hiroaki Mori 1992-03-03
5068581 Horizontal deflection circuit for high-frequency scanning Akira Nishiura, Yasukazu Seki 1991-11-26
5051808 Semiconductor device with low inductance of wirings connecting individual elements of the device Akira Saito 1991-09-24
4984996 Printed circuit board edge connector Tetsuya Watanabe, Yoshio Sato, Tsutomu Nakamura, Takashi Kamono 1991-01-15
4899029 Electrical connector high-speed welding apparatus 1990-02-06