Assignee
Inventors
- Takeji Niikura (19 patents)
- Yoji Ara (17 patents)
- Tsutomu Shimada (22 patents)
- Shoichi Kan (20 patents)
- Masaaki Kakizaki (10 patents)
- Nozomu Nishiberi (30 patents)
- Yasushi Koike (15 patents)
- Seiji Ogasawara (34 patents)
US Patent 5880754 · Granted Mar 9, 1999