Assignee
Inventors
- Yasuhiro Okada (51 patents)
- Kengo Yoshioka (4 patents)
- Fumio Sakamoto (13 patents)
- Sentaro Sugita (1 patents)
- Hidekazu Hirano (7 patents)
- Takeshi Nishikayama (3 patents)
- Hiroyuki Takahara (22 patents)
US Patent 6190294 · Granted Feb 20, 2001