Assignee
Inventors
- Tsutomu Kagiya (2 patents)
- Motonobu Minagawa (52 patents)
- Yutaka Nakahara (61 patents)
- Ryoji Kimura (13 patents)
- Tsuneo Tsubakimoto (1 patents)
- Ryoichi Oshiumi (1 patents)
- Koichi Sakano (1 patents)
US Patent 4820844 · Granted Apr 11, 1989