Assignee
Inventors
- Jitsuo Masuda (22 patents)
- Hideaki Hagihara (21 patents)
- Hiroshi Kinashi (19 patents)
- Junji Morimoto (13 patents)
- Ken Yamagishi (26 patents)
- Teruhiko Noguchi (14 patents)
- Itaru Kawabata (22 patents)
US Patent 4970557 · Granted Nov 13, 1990