Assignee
Inventors
- Shigeharu Inouye (40 patents)
- Masao Koyama (15 patents)
- Keinosuke Miyauchi (5 patents)
- Takashi Tsuruoka (43 patents)
- Fumio Kai (7 patents)
- Kuniomi Matsumoto (6 patents)
- Taro Niida (17 patents)
- Eiichi Akita (5 patents)
US Patent 4647572 · Granted Mar 3, 1987