Assignee
Inventors
- Kenji Oeda (18 patents)
- Toshiyuki Sakaki (6 patents)
- Hideo Ohkawa (11 patents)
- Yoshiyasu Yabusaki (8 patents)
- Hiroko Murakami (4 patents)
- Keiko Nakamura (13 patents)
- Masatoshi Shimizu (33 patents)
US Patent 4766068 · Granted Aug 23, 1988