TH

Tadashi Hayakawa

Ricoh Company: 62 patents #126 of 9,818Top 2%
HK Henkel Ag & Co. Kgaa: 5 patents #280 of 2,331Top 15%
Sumitomo Electric Industries: 5 patents #5,365 of 21,551Top 25%
YC Yoshino Kogyosho Co.: 4 patents #100 of 361Top 30%
HI Hitachi: 3 patents #10,712 of 28,497Top 40%
HC Hayakawa Rubber Co.: 2 patents #9 of 43Top 25%
TC The Coca-Cola: 1 patents #680 of 1,471Top 50%
Overall (All Time): #22,636 of 4,157,543Top 1%
80
Patents All Time

Issued Patents All Time

Showing 76–80 of 80 patents

Patent #TitleCo-InventorsDate
5557373 Cleaning system for charging drum of an image forming apparatus Yoshiaki Miyashita, Takeshi Tabuchi, Kouichi Yamazaki, Nobuo Kikuchi, Kentaro Matsumoto +1 more 1996-09-17
5512708 Toner used in an image forming apparatus Sadao Takahashi, Kouichi Yamazaki, Nobuo Kikuchi, Kentaro Matsumoto, Yoshiaki Miyashita +1 more 1996-04-30
4984974 Screw type vacuum pump with introduced inert gas Koutarou Naya, Kazuaki Shiinoki, Kiyoshi Masujima, Riichi Uchida, Katsumi Matsubara 1991-01-15
4797068 Vacuum evacuation system Kazuaki Shiinoki, Sinji Mitsuhashi, Kotaro Naya 1989-01-10
4767284 Screw vacuum pump unit Kazuaki Shiinoki, Koutarou Naya, Shinji Mitsuhashi, Riichi Uchida 1988-08-30