Assignee
Inventors
- Takeshi Sakai (115 patents)
- Masafumi Nakashima (13 patents)
- Takeshi Wakisaka (20 patents)
- Hiroshi Kishita (39 patents)
- Mikio Matsuda (47 patents)
- Hiroshi Ogawa (431 patents)
- Hiroyasu Kato (35 patents)
US Patent 6234769 · Granted May 22, 2001