Assignee
Inventors
- Yuji Tsushima (62 patents)
- Yoshikazu Tanaka (223 patents)
- Yoshiko Tamaki (20 patents)
- Masanao Ito (7 patents)
- Kentaro Shimada (85 patents)
- Yonetaro Totsuka (19 patents)
- Shigeo Nagashima (37 patents)
US Patent 6044450 · Granted Mar 28, 2000