Assignee
Inventors
- Tetsuo Takematsu (65 patents)
- Yasutomo Takeuchi (10 patents)
- Kozo Hiraishi (1 patents)
- Toshikazu Fujii (12 patents)
- Shoji Nishimula (1 patents)
- Motoyuki Suzuki (3 patents)
- Unknown
- Hiroshi Hayashi (251 patents)
US Patent 4657581 · Granted Apr 14, 1987