Assignee
Inventors
- Chikao Yoshikumi (65 patents)
- Yoshio Ohmura (24 patents)
- Fumio Hirose (28 patents)
- Masanori Ikuzawa (30 patents)
- Kenichi Matsunaga (57 patents)
- Takayoshi Fujii (50 patents)
- Minoru Ohhara (20 patents)
- Takao Ando (45 patents)
US Patent 4957906 · Granted Sep 18, 1990