Assignee
Inventors
- Kunihiko Ikeda (12 patents)
- Unknown
- Takashi Yokota (47 patents)
- Akira Shimura (19 patents)
- Yutaka Kodama (22 patents)
- Shigeru Yamazaki (74 patents)
- Masaichi Niro (24 patents)
- Satoru Tomita (46 patents)
US Patent 4887133 · Granted Dec 12, 1989