Assignee
Inventors
- Yasuhiro Tsuchiya (9 patents)
- Kenichi Sekiyama (4 patents)
- Yuji Kageyama (11 patents)
- Masatsugu Sakamoto (1 patents)
- Norio Sato (82 patents)
- Shigetoshi Sugiyama (6 patents)
- Toshio Kurauchi (13 patents)
US Patent 5001172 · Granted Mar 19, 1991