Assignee
Inventors
- Masahiro Tanaka (223 patents)
- Takumi Ohyama (1 patents)
- Akihiko Hirayama (1 patents)
- Tetsushi Kiyokawa (2 patents)
- Seiji Ichii (1 patents)
- Yutaka Katsura (1 patents)
- Tadashi Ono (51 patents)
- Katsunori Shimizu (14 patents)
US Patent 4958956 · Granted Sep 25, 1990