Assignee
Inventors
- Hirokazu Hasegawa (4 patents)
- Isamu Endo (2 patents)
- Shingo Koyama (26 patents)
- Masashi Isozaki (12 patents)
- Yukari Yoshiyama (1 patents)
- Shigenori Nozawa (20 patents)
- Norio Arakawa (1 patents)
US Patent 5190961 · Granted Mar 2, 1993