Assignee
Inventors
- Makoto Shiomi (111 patents)
- Michitaka Ohsawa (42 patents)
- Toshiyuki Sakamoto (13 patents)
- Kuninori Matsumi (10 patents)
- Kosuke Ozeki (30 patents)
- Ikuo Yuki (4 patents)
- Kenji Sato (420 patents)
US Patent 4977446 · Granted Dec 11, 1990