Assignee
Inventors
- Shigeo Okonogi (14 patents)
- Mamoru Tomita (31 patents)
- Seiichi Shimamura (17 patents)
- Toshio Tomimura (3 patents)
- Norio Ishibashi (11 patents)
- Hiroshi Miyakawa (13 patents)
- Koichi Sugawara (1 patents)
US Patent 4985246 · Granted Jan 15, 1991