RY

Ritsu Yasukawa

PC Petroleum Energy Center: 5 patents #5 of 180Top 3%
SC Sakai Chemical Industry Co.: 5 patents #18 of 227Top 8%
CC Cosmo Oil Co.: 4 patents #33 of 229Top 15%
AT Agency Of Industrial Science And Technology: 2 patents #293 of 1,778Top 20%
Overall (All Time): #1,048,389 of 4,157,543Top 30%
5
Patents All Time

Issued Patents All Time

Showing 1–5 of 5 patents

Patent #TitleCo-InventorsDate
6045765 Catalyst and method for catalytic reduction of nitrogen oxides Tadao Nakatsuji, Keiichi Tabata, Kazuyuki Ueda 2000-04-04
5853679 Removal of nitrogen oxide from exhaust gas Mitsunori Tabata, Masaaki Kawatsuki, Katsumi Miyamoto, Hiroshi Tsuchida, Tomohiro Yoshinari +8 more 1998-12-29
5733837 Catalyst for catalytic reduction of nitrogen oxides Tadao Nakatsuji, Hiromitsu Shimizu, Katsumi Miyamoto, Hiroshi Tsuchida 1998-03-31
5474965 Catalyst for catalytic reduction of nitrogen oxide Tadao Nakatsuji, Hiromitsu Shimizu, Masaaki Kawatsuki, Mitsunori Tabata, Hiroshi Tsuchida +2 more 1995-12-12
5380692 Catalyst for catalytic reduction of nitrogen oxide Tadao Nakatsuji, Hiromitsu Shimizu, Fujio Suganuma, Akihiro Kitazume, Hiroshi Tsuchida +7 more 1995-01-10