Assignee
Inventors
- Yasuhiro Morinaka (33 patents)
- Hiroyoshi Nishi (7 patents)
- Toshiaki Watanabe (9 patents)
- Satoshi Yuki (10 patents)
- Hiroko Sakurai (8 patents)
- Yoshio Hayashi (72 patents)
- Nobuko Fukushima (4 patents)
US Patent 4906644 · Granted Mar 6, 1990