Assignee
Inventors
- Katsuhiko Hirano (15 patents)
- Kunio Enomoto (22 patents)
- Eisaku Hayashi (19 patents)
- Sadato Shimizu (9 patents)
- Ren Morinaka (16 patents)
- Tetsuya Ishikawa (252 patents)
- Shigeru Tanaka (330 patents)
- Noboru Chiba (12 patents)
US Patent 6519991 · Granted Feb 18, 2003