Assignee
Inventors
- Katsuyoshi Iwamatsu (29 patents)
- Yasuo Sato (22 patents)
- Masaaki Izumi (2 patents)
- Fukio Konno (10 patents)
- Seiji Shibahara (43 patents)
- Shigeharu Inoye (4 patents)
- Koichi Shudo (57 patents)
- Kazuko Amano (1 patents)
US Patent 5631257 · Granted May 20, 1997