Assignee
Inventors
- Tadashi Umeda (21 patents)
- Hideo Miyoshi (9 patents)
- Keiichi Kishimoto (13 patents)
- Kazumi Iida (12 patents)
- Kazunori Akiyama (15 patents)
- Yuji Abe (74 patents)
- Masato Taniguchi (79 patents)
US Patent 4520354 · Granted May 28, 1985