Assignee
Inventors
- Kazutoshi Shimogori (11 patents)
- Kazuo Fujiwara (18 patents)
- Kiyoshi Sugie (13 patents)
- Kikuo Morita (2 patents)
- Takenori Nakayama (16 patents)
- Mutsuhiro Miyakawa (1 patents)
- Yasushi Torii (7 patents)
US Patent 4820486 · Granted Apr 11, 1989