Assignee
Inventors
- Yoshinori Hirai (30 patents)
- Satoshi Niiyama (41 patents)
- Tomoki Gunjima (35 patents)
- Masanori Yuki (9 patents)
- Masaya Kunigita (15 patents)
- Yukio Yoshikawa (25 patents)
- Eiji Shidoji (17 patents)
US Patent 6122021 · Granted Sep 19, 2000