Assignee
Inventors
- Koichi Yasuda (39 patents)
- Shosaburo Nakano (2 patents)
- Noboru Nishiyama (9 patents)
- Takaro Matsumoto (1 patents)
- Katsuaki Nakatsuji (1 patents)
- Tadao Komatsu (3 patents)
- Tadashi Nakajima (15 patents)
US Patent 4904842 · Granted Feb 27, 1990