Assignee
Inventors
- Michio Yamagishi (6 patents)
- Akira Kawashima (3 patents)
- Taku Mizutani (5 patents)
- Hiroshi Hara (3 patents)
- Kazutoshi Mizoue (7 patents)
- Sadafumi Omura (19 patents)
- Haruo Seto (19 patents)
- Noboru Otake (12 patents)
US Patent 4269971 · Granted May 26, 1981