Assignee
Inventors
- Masao Tanihara (27 patents)
- Kiichiro Oka (5 patents)
- Hideaki Yamada (146 patents)
- Akira Kobayashi (163 patents)
- Toshihide Nakashima (15 patents)
- Yoshiaki Omura (24 patents)
- Koichi Takakura (12 patents)
US Patent 4889917 · Granted Dec 26, 1989