Assignee
Inventors
- Kiyofumi Ishikawa (17 patents)
- Toshio Nagase (11 patents)
- Toshiaki Mase (22 patents)
- Takashi Hayama (21 patents)
- Masaki Ihara (19 patents)
- Masaru Nishikibe (13 patents)
- Mitsuo Yano (13 patents)
US Patent 5714479 · Granted Feb 3, 1998