Assignee
Inventors
- Masao Koyama (15 patents)
- Chika Kikuchi (7 patents)
- Osamu Ushiroda (5 patents)
- Takashi Ando (22 patents)
- Hiroshi Nagaso (1 patents)
- Kazuyuki Fuji (2 patents)
- Masayo Okuno (3 patents)
- Toyokazu Hiranuma (3 patents)
US Patent 6355642 · Granted Mar 12, 2002