Assignee
Inventors
- Ikuo Ochiai (12 patents)
- Hideaki Omori (1 patents)
- Manjiro Sato (1 patents)
- Masatsugu Murao (5 patents)
- Kazuhiko Murao (3 patents)
- Hideo Chiba (1 patents)
- Tsuneo Okamoto (12 patents)
- Tadashi Fuku (1 patents)
US Patent 5117874 · Granted Jun 2, 1992