Assignee
Inventors
- Tomoya Ogawa (29 patents)
- Masaaki Numata (17 patents)
- Mamoru Sugimoto (26 patents)
- Shohei Shibayama (7 patents)
- Shoji Yoshimura (15 patents)
- Masayoshi Ito (32 patents)
- Yoshiyasu Shitori (27 patents)
US Patent 4950750 · Granted Aug 21, 1990