TK

Toshio Kumagai

SE Seiko Epson: 128 patents #14 of 7,774Top 1%
SC Shimizu Construction Co.: 2 patents #41 of 352Top 15%
Bridgestone: 1 patents #1,586 of 2,860Top 60%
SG Seiko Group: 1 patents #32 of 90Top 40%
Overall (All Time): #8,274 of 4,157,543Top 1%
131
Patents All Time

Issued Patents All Time

Showing 126–131 of 131 patents

Patent #TitleCo-InventorsDate
5453770 On-demand type ink jet print head Takahiro Katakura, Shinji Yasukawa, Hideaki Sonehara, Masanao Matsuzawa, Fujio Akahane +3 more 1995-09-26
5266975 Ink jet printing apparatus having means for preventing excessive ink purging Seiji Mochizuki, Kazuhisa Kawakami, Tsuyoshi Tomii 1993-11-30
5260724 Capping device for ink jet printer Tsuyoshi Tomii, Seiji Mochizuki, Yukihiro Hanaoka, Hitoshi Hayakawa 1993-11-09
5248999 Ink jet printing apparatus having ink purging feature Seiji Mochizuki, Kazuhisa Kawakami, Tsuyoshi Tomii 1993-09-28
5129803 Concrete leveling machine Hajime Nomura, Yasuo Kajioka, Tomio Komine, Akira Okada, Tomoo Shokawa +1 more 1992-07-14
D321900 Ink cartridge 1991-11-26