Assignee
Inventors
- Yoshiaki Tanaka (318 patents)
- Tomoji Aotsuka (17 patents)
- Naomi Kobayashi (5 patents)
- Naoki Nakata (4 patents)
- Kuniyoshi Ogura (9 patents)
- Motoki Torizuka (4 patents)
- Naoyoshi Miura (7 patents)
- Heihachiro Arai (3 patents)
US Patent 4916146 · Granted Apr 10, 1990