Assignee
Inventors
- Yoshinari Iwamura (3 patents)
- Katsunori Okimoto (2 patents)
- Toshio Teshima (3 patents)
- Shinobu Miyahara (2 patents)
- Shigetaka Uchida (1 patents)
- Taizo Sera (3 patents)
- Koichi Ozawa (10 patents)
US Patent 4646977 · Granted Mar 3, 1987