Assignee
Inventors
- Takashi Tsuruoka (43 patents)
- Satoshi Imai (3 patents)
- Atsuyuki Satoh (2 patents)
- Tetsuro Watanabe (19 patents)
- Koji Watanabe (255 patents)
- Shigeharu Inouye (40 patents)
- Taro Niida (17 patents)
US Patent 4469643 · Granted Sep 4, 1984