Assignee
Inventors
- Hiroko Haraguchi (7 patents)
- Yoshihiri Iwashita (1 patents)
- Toshiro Yoshioka (3 patents)
- Junichi Koyama (31 patents)
- Akihiro Yamanaka (104 patents)
- Mitsunari Nakamura (5 patents)
- Katsumasa Haikawa (13 patents)
US Patent 5631939 · Granted May 20, 1997