Assignee
Inventors
- Naonobu Hatano (1 patents)
- Buichi Fujitani (2 patents)
- Toshiaki Kadokawa (1 patents)
- Yasushi Matsumura (1 patents)
- Tomoyuki Asai (2 patents)
- Arata Yasuda (2 patents)
- Keiichi Uchida (1 patents)
US Patent 4906663 · Granted Mar 6, 1990