Assignee
Inventors
- Kazutaka Kuwana (39 patents)
- Tsuyoshi Yoshida (111 patents)
- Shinsuke Sakane (20 patents)
- Hiroyuki Ichikawa (133 patents)
- Nobuyasu Nakanishi (46 patents)
- Ken Asami (38 patents)
- Tatsuo Sugitani (24 patents)
US Patent 4912641 · Granted Mar 27, 1990