SK

Sumihisa Kotani

HI Hitachi: 6 patents #6,582 of 28,497Top 25%
HC Hitachi Koki Co.: 2 patents #413 of 888Top 50%
HC Hitachi Powdered Metals Co.: 1 patents #113 of 246Top 50%
Overall (All Time): #765,152 of 4,157,543Top 20%
7
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
5682588 Method for producing ferrous sintered alloy having quenched structure Tadayuki Tsutsui, Kei Ishii, Hideo Shikata 1997-10-28
4579512 Scroll-type fluid machine with radial clearance between wraps Masao Shiibayashi, Kazutaka Suefuji, Kenji Tojo, Akira Murayama 1986-04-01
4560330 Scroll device with suction chamber pressure relief Akira Murayama, Hiroaki Kuno, Naoshi Uchikawa, Takahiro Tamura, Takao Mizuno 1985-12-24
4557675 Scroll-type fluid machine with back pressure chamber biasing an orbiting scroll member Akira Murayama, Hiroaki Kuno, Naoshi Uchikawa, Takahiro Tamura, Takao Mizuno +4 more 1985-12-10
4475360 Refrigeration system incorporating scroll type compressor Kazutaka Suefuji, Kensaku Oguni, Kenji Tojo 1984-10-09
4392423 Printing hammer driving apparatus Isao Nakajima, Koji Tagusari, Kenji Okuna, Toru Hayama, Kazue Takahashi +1 more 1983-07-12
4382370 Refrigerating system using scroll type compressor Kazutaka Suefuji, Tetsuya Arata, Yoshikatsu Tomita, Naoshi Uchikawa, Akira Murayama 1983-05-10