Assignee
Inventors
- Hiroitsu Kawata (15 patents)
- Tadayoshi Ohmura (10 patents)
- Shunji Hasumi (5 patents)
- Yutaka Konno (9 patents)
- Masayoshi Aruga (17 patents)
- Seiki Tashiro (1 patents)
- Toshimitsu Konno (3 patents)
- Ken Iwai (2 patents)
US Patent 4578391 · Granted Mar 25, 1986