Assignee
Inventors
- Masafumi Suzaki (11 patents)
- Katsumasa Mikami (10 patents)
- Rooichi Kobayashi (1 patents)
- Fumio Takahagi (4 patents)
- Yousuke Nagano (11 patents)
- Tomoji Kitagishi (10 patents)
- Shigetaka Furukawa (6 patents)
US Patent 4768894 · Granted Sep 6, 1988