Assignee
Inventors
- Akiyoshi Nakano (13 patents)
- Yoshimichi Harada (20 patents)
- Yasuzo Kirita (6 patents)
- Tadashi Miyahara (23 patents)
- Yoshio Yagiri (1 patents)
- Michiko Ueda (2 patents)
- Yasunori Ueda (21 patents)
US Patent 4747952 · Granted May 31, 1988