Assignee
Inventors
- Osamu Wada (99 patents)
- Yoshiyuki Sasaki (75 patents)
- Shiro Kumakawa (12 patents)
- Akio Kimura (66 patents)
- Toshimasa Shimizu (1 patents)
- Hiroyuki Nagai (106 patents)
- Shunichi Takeda (31 patents)
- Takumi Shimazu (1 patents)
US Patent 4209559 · Granted Jun 24, 1980