Assignee
Inventors
- Seiji Shibahara (43 patents)
- Tsuneo Okonogy (1 patents)
- Yasushi Murai (19 patents)
- Shunzo Fukatsu (29 patents)
- Taro Niida (17 patents)
- Burton G. Christensen (126 patents)
- Tadashi Wakazawa (6 patents)
US Patent 4645769 · Granted Feb 24, 1987