Assignee
Inventors
- Yoshihisa Sato (69 patents)
- Susumu Akiyama (42 patents)
- Yuji Hirabayashi (23 patents)
- Katsuhiro Ina (11 patents)
- Katsunori Ito (31 patents)
- Takao Saito (118 patents)
- Tetsuo Tanigawa (4 patents)
US Patent 4894781 · Granted Jan 16, 1990