Assignee
Inventors
- Masayoshi Hashima (22 patents)
- Fumi Hasegawa (6 patents)
- Keiju Okabayashi (20 patents)
- Ichiro Watanabe (40 patents)
- Shinji Kanda (17 patents)
- Naoyuki Sawasaki (10 patents)
- Yuichi Murase (10 patents)
US Patent 5617335 · Granted Apr 1, 1997