Assignee
Inventors
- Seijun Higuchi (11 patents)
- Yashichi Oyagi (9 patents)
- Tomonari Oga (3 patents)
- Toshinori Mizuguchi (8 patents)
- Senkichi Tsujimura (1 patents)
- Toshinori Katayama (2 patents)
- Fumio Yamamoto (27 patents)
- Kenichi Asakawa (26 patents)
US Patent 4731301 · Granted Mar 15, 1988