Assignee
Inventors
- Hiroyuki Oka (75 patents)
- Michio Kobayashi (64 patents)
- Masahiro Shimada (46 patents)
- Satoru Watanabe (199 patents)
- Junichi Hirayama (4 patents)
- Mamoru Sawada (78 patents)
- Yuzo Imoto (43 patents)
US Patent 6196641 · Granted Mar 6, 2001