Assignee
Inventors
- Ryousuke Touyama (2 patents)
- Hiroyuki Inouye (2 patents)
- Tetsuro Shingu (3 patents)
- Yoshio Takeda (8 patents)
- Takeshi Ikumoto (5 patents)
- Hidetoshi Okuyama (7 patents)
- Osamu Yamamoto (4 patents)
US Patent 4232159 · Granted Nov 4, 1980