Assignee
Inventors
- Shigeru Masuda (39 patents)
- Tsukasa Nakano (9 patents)
- Masayuki Kojima (79 patents)
- Masayuki Nakanishi (54 patents)
- Toshihiko Nakano (34 patents)
- Haruo Hakamada (10 patents)
- Hideo Ishii (73 patents)
US Patent 5754915 · Granted May 19, 1998