Assignee
Inventors
- Masatoshi Miyazaki (2 patents)
- Ken Sasaki (6 patents)
- Hachiro Maeda (2 patents)
- Hisami Sakai (2 patents)
- Sumio Kamikawa (4 patents)
- Kiyoshi Takai (15 patents)
- Yutaka Ogawa (41 patents)
- Yuichi Tanaka (2 patents)
US Patent 5033164 · Granted Jul 23, 1991