RY

Ryoji Yokoyama

HC Hitachi Chemical Company: 2 patents #701 of 1,946Top 40%
Fujitsu Limited: 1 patents #14,843 of 24,456Top 65%
Overall (All Time): #1,635,050 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
5943405 Credit calling service system Toshihiro Morikawa, Kouki Shigaki 1999-08-24
4824509 Method for pressure lamination utilizing fluid medium with partial solidification thereof for sealing pressure chamber Kenji Tonoki, Kazuyoshi Tsunoda, Haruki Yokono, Hisao Kono, Fumiaki Nakamura 1989-04-25
4734155 Method and device for manufacturing a laminated material Kazuyoshi Tsunoda, Kenji Tonoki, Haruki Yokono, Hisao Kono, Kazuo Kobayashi 1988-03-29