Assignee
Inventors
- Masaki Takakura (21 patents)
- Hideto Hayasaki (3 patents)
- Hideo Takemura (5 patents)
- Masao Izumi (17 patents)
- Keisuke Iwasaki (72 patents)
- Yoji Noguchi (15 patents)
- Yasukuni Yamane (24 patents)
- Noritoshi Kako (29 patents)
US Patent 4878178 · Granted Oct 31, 1989