Assignee
Inventors
- Yasuo Sakami (2 patents)
- Shigetaka Okina (1 patents)
- Junichi Tsubouchi (2 patents)
- Shozo Izaki (1 patents)
- Toshitaka Fukushima (35 patents)
- Hiroyuki Watanabe (516 patents)
- Masao Ishizaki (3 patents)
US Patent 4839854 · Granted Jun 13, 1989