Assignee
Inventors
- Kazuyuki Sakota (4 patents)
- Wataru Minoshima (1 patents)
- Takayuki Masuda (17 patents)
- Chihiro Imai (18 patents)
- Tetsuro Nakahama (1 patents)
- Toshimitsu Sugawara (1 patents)
- Yoshio Nakagawa (3 patents)
US Patent 4914163 · Granted Apr 3, 1990