Assignee
Inventors
- Shuichi Kanagawa (47 patents)
- Shinji Nakao (5 patents)
- Kiyoshi Nakai (4 patents)
- Kunimasa Kamio (29 patents)
- Shunsuke Matsushima (5 patents)
- Kazuhiko Hata (23 patents)
- Kentaro Mashita (35 patents)
US Patent 4211715 · Granted Jul 8, 1980