Assignee
Inventors
- Masashi Yamaura (10 patents)
- Hirokazu Nakajima (25 patents)
- Nobuyoshi Maejima (6 patents)
- Mikio Negishi (7 patents)
- Tomio Yamada (26 patents)
- Tomomichi Koizumi (3 patents)
- Tsuneo Endoh (56 patents)
US Patent 7468294 · Granted Dec 23, 2008