HF

Hirofumi Fujiwara

NE Nec Electronics: 7 patents #66 of 1,789Top 4%
TO Toyota: 3 patents #8,352 of 26,838Top 35%
RE Renesas Electronics: 2 patents #1,855 of 4,529Top 45%
MI Mitsubishi: 1 patents #54 of 173Top 35%
NC Ntt Communications: 1 patents #34 of 129Top 30%
Fujitsu Limited: 1 patents #14,843 of 24,456Top 65%
SU Sumitomo: 1 patents #19 of 62Top 35%
Sumitomo Electric Industries: 1 patents #13,249 of 21,551Top 65%
SL Suntory Holdings Limited: 1 patents #406 of 846Top 50%
UM Uchiyama Manufacturing: 1 patents #36 of 116Top 35%
TI Toyota Industries: 1 patents #904 of 1,610Top 60%
Overall (All Time): #297,782 of 4,157,543Top 8%
16
Patents All Time

Issued Patents All Time

Showing 1–16 of 16 patents

Patent #TitleCo-InventorsDate
9793784 Cooling structure for slip ring device Satoshi Tominaga, Takahiro Shiina, Akira Murakami, Hitoshi Takayama, Shu Asami +3 more 2017-10-17
9760101 Switching regulator control circuit Hirokazu Kawagoshi, Yasuhiro Kosaka 2017-09-12
8657920 Apparatus for purifying hydrogen and method for using the same Haruyuki Nakanishi, Norihiko Nakamura, Hidekazu Arikawa, Hidehito Kubo, Keiji Toh +2 more 2014-02-25
8493147 Differential amplifier and source driver 2013-07-23
8475722 Hydrogen generation device and method of using same Haruyuki Nakanishi, Norihiko Nakamura, Hidekazu Arikawa, Hidehito Kubo, Keiji Toh +2 more 2013-07-02
7886923 Container stopper with synthetic resin skin Takiko Nakada, Toshihiro Ueda, Katsuya Fujimoto 2011-02-15
7855532 Power supply circuit with control switches to voltage multiplier having same frequency as clock 2010-12-21
7741899 Step-up power supply circuit and stepping-up method 2010-06-22
7663427 Booster circuit 2010-02-16
7608946 Boosting circuit and integrated circuit having the same 2009-10-27
7505290 Power supply apparatus including charge-pump type step-up circuit having different discharging time constants 2009-03-17
7445135 Container and pusiier Taneo Miyata, Yasushi Hasui, Mikio Murakami 2008-11-04
7324358 Power supply apparatus including charge-pump type step-up circuit operated at clock signal frequency 2008-01-29
7183837 Charge pump circuit with latch-up prevention 2007-02-27
7069252 Electronic transaction server, client for seller, client for buyer and electronic transaction method Munehiko Ishimi, Kazuhiko Sekine, Toshihiko Kaji, Toshiyuki Iida, Yoshihide Tanaka +3 more 2006-06-27
5130555 Tape crease inspecting method and apparatus having a stripe shaped pattern reflection plate Noriyuki Suzuki, Yoshikazu Okahashi, Katsunori Oka 1992-07-14