Assignee
Inventors
- Akihiko Sugiyama (113 patents)
- Katsushi Ishii (22 patents)
- Hidenori Ashikawa (2 patents)
- Michika Uesugi (14 patents)
- Haruo Ishikawa (18 patents)
- Hitoshi Wakatsuki (2 patents)
- Kimithuka Ueda (2 patents)
US Patent 5664428 · Granted Sep 9, 1997