Assignee
Inventors
- Masakazu Suzuoki (67 patents)
- Akio Ohba (144 patents)
- Masaaki Oka (75 patents)
- Toshiyuki Hiroi (24 patents)
- Teiji Yutaka (27 patents)
- Toyoshi Okada (13 patents)
- Masayoshi Tanaka (45 patents)
US Patent 6807620 · Granted Oct 19, 2004