Assignee
Inventors
- Hideo Yamagishi (29 patents)
- Minori Yamaguchi (23 patents)
- Keizo Asaoka (7 patents)
- Akihiko Hiroe (9 patents)
- Masataka Kondo (36 patents)
- Kazunori Tsuge (50 patents)
- Yoshihisa Tawada (54 patents)
US Patent 4926230 · Granted May 15, 1990