Assignee
Inventors
- Kenji Hirai (29 patents)
- Takeshi Yoshizawa (15 patents)
- Sachiko Itoh (1 patents)
- Natsuko Okano (3 patents)
- Yuriko Nagata (1 patents)
- Chikako Ota (4 patents)
- Toshiki Fukuchi (20 patents)
- Keiko Yoshiya (1 patents)
US Patent 6548511 · Granted Apr 15, 2003