Assignee
Inventors
- Kikuo Nagatoshi (8 patents)
- Toshimichi Ito (14 patents)
- Akio Inayoshi (2 patents)
- Atsunobu Sakoda (1 patents)
- Noriki Fujimoto (1 patents)
- Hidehiko Kaji (2 patents)
- Hirozo Sugahana (1 patents)
US Patent 4181689 · Granted Jan 1, 1980