Assignee
Inventors
- Masahiro Harada (96 patents)
- Kenichi Yanagi (21 patents)
- Takeo Fukushima (16 patents)
- Kusuo Furukawa (8 patents)
- Naohiko Soeda (4 patents)
- Norio Ohta (93 patents)
- Kuniaki Sato (49 patents)
- Yasuhisa Nakajima (118 patents)
US Patent 4923396 · Granted May 8, 1990