Assignee
Inventors
- Katsu Ito (4 patents)
- Munehiro Shinabe (5 patents)
- Akira Miyajima (33 patents)
- Nobuyuki Hashimoto (56 patents)
- Hideshi Ohno (10 patents)
- Akira Tsuzuki (29 patents)
- Shigeru Morokawa (41 patents)
- Minoru Natori (6 patents)
US Patent 4663670 · Granted May 5, 1987