Assignee
Inventors
- Shigeo Tsujioka (11 patents)
- Seiichi Kanema (9 patents)
- Eiji Okamura (21 patents)
- Kiyoshi Umezawa (2 patents)
- Mitsuo Ooyama (12 patents)
- Toshihisa Aoshima (7 patents)
- Mitsugu Yoneyama (2 patents)
US Patent 4626838 · Granted Dec 2, 1986