Assignee
Inventors
- Akira Ibi (3 patents)
- Takushi Sato (3 patents)
- Akihiro Yamaguchi (256 patents)
- Shigeru Takahashi (63 patents)
- Shigeyuki Shishido (3 patents)
- Shoji Tamai (68 patents)
- Hisai Nakajima (1 patents)
US Patent 4687836 · Granted Aug 18, 1987