Assignee
Inventors
- Yasuo Maekawa (6 patents)
- Tsunetoshi Sekiguchi (2 patents)
- Masahiko Waki (8 patents)
- Hiroshi Koide (75 patents)
- Kisuke Watanabe (1 patents)
- Osamu Matsumura (11 patents)
- Hisao Yamagata (7 patents)
US Patent 4234948 · Granted Nov 18, 1980