Assignee
Inventors
- Fumihiko Hamada (9 patents)
- Kunio Tsuboi (8 patents)
- Mitihiko Hasegawa (1 patents)
- Yasuji Ichizawa (1 patents)
- Toshiya Yabe (5 patents)
- Kunitomo Yamasaki (1 patents)
- Yasunobu Takahashi (4 patents)
- Katsuji Mizuta (2 patents)
US Patent 5111252 · Granted May 5, 1992