Assignee
Inventors
- Masao Nishida (15 patents)
- Yasuhiro Taka (3 patents)
- Toshikazu Nakajima (12 patents)
- Keiichiro Nakaue (2 patents)
- Ryuji Otsuka (5 patents)
- Kakuichi Shiomi (19 patents)
- Yoichi Kusui (3 patents)
US Patent 6064939 · Granted May 16, 2000