Assignee
Inventors
- Muneo Aoyagi (17 patents)
- Kazuhiro Takanashi (6 patents)
- Masaaki Yamamura (28 patents)
- Moriyasu Murata (18 patents)
- Hiroyuki Yamada (357 patents)
- Hiroyuki Araki (11 patents)
- Takanori Fukumoto (2 patents)
US Patent 4978770 · Granted Dec 18, 1990