RA

Ryohei Ashihara

Sumitomo Electric Industries: 8 patents #3,473 of 21,551Top 20%
MC Mitsui Mining & Smelting Co.: 2 patents #281 of 838Top 35%
Overall (All Time): #659,670 of 4,157,543Top 20%
8
Patents All Time

Issued Patents All Time

Showing 1–8 of 8 patents

Patent #TitleCo-InventorsDate
7169507 Manganese dry battery Koji Inokuchi, Keiji Ogino, Isao Kubo 2007-01-30
7157182 Battery Seiji Wada, Susumu Kato, Yasushi Sumihiro, Kenji Yamamoto, Yuji Mototani 2007-01-02
6500584 Manganese dry batteries Tetsuya Kobayashi, Keiji Ogino, Michiko Inui 2002-12-31
5853920 Method of manufacturing zinc-titanium mother alloy and manganese dry battery Hajime Murakami, Kohei Kubota, Koichi Sato 1998-12-29
5595836 Manganese dry battery Eiji Tano, Shohei Nozaki, Hajime Murakami, Kohei Kubota, Akira Kato +1 more 1997-01-21
5017445 Dry cell Kikumitsu Suehiro, Kazuo Sugino, Jun Miyoshi, Masatsugu Eri 1991-05-21
4965149 Metal jacket and dry cell using the same Kikumitsu Suehiro, Masayuki Yabuta, Hideaki Yamagishi 1990-10-23
4927719 Dry cell Kikumitsu Suehiro, Kazuo Sugino, Jun Miyoshi 1990-05-22