Assignee
Inventors
- Masashi Ishikawa (29 patents)
- Masatoshi Shimada (3 patents)
- Katsutomo Okamoto (1 patents)
- Shigeyoshi Sugita (1 patents)
- Masayuki Goto (31 patents)
- Yukuo Koizumi (1 patents)
- Osamu Kaneda (5 patents)
US Patent 4400782 · Granted Aug 23, 1983