Assignee
Inventors
- Masao Ariga (12 patents)
- Hiroyuki Hattori (126 patents)
- Katsuichi Shimizu (64 patents)
- Hirotoshi Kishi (19 patents)
- Hiroshi Ogawa (431 patents)
- Takahiko Amanuma (6 patents)
- Kazumi Umezawa (22 patents)
- Seiji Sagara (26 patents)
US Patent 4193483 · Granted Mar 18, 1980