Assignee
Inventors
- Tsuneo Takagi (5 patents)
- Kenjiro Tanabe (5 patents)
- Masao Fukushima (23 patents)
- Hiroki Kyushima (2 patents)
- Kiyoshi Takenaka (3 patents)
- Akira Okada (146 patents)
- Yoshinor Isogaki (1 patents)
US Patent 4641951 · Granted Feb 10, 1987