Assignee
Inventors
- Yutaka Hirano (31 patents)
- Hirokazu Kawakami (7 patents)
- Masaaki Tanaami (1 patents)
- Motohiko Kosano (7 patents)
- Hiroshi Takagi (167 patents)
- Yoshio Ishiai (5 patents)
- Ituo Iwahashi (1 patents)
US Patent 4573880 · Granted Mar 4, 1986