Assignee
Inventors
- Isamu Koyama (6 patents)
- Tadaki Yasumura (1 patents)
- Kyuichi Nemoto (4 patents)
- Takako Mae (2 patents)
- Kan Saiga (4 patents)
- Hisako Takagi (4 patents)
- Atsuko Isoda (1 patents)
- Toshio Tanabe (5 patents)
US Patent 6210912 · Granted Apr 3, 2001