Assignee
Inventors
- Toshihiko Karasaki (60 patents)
- Hiroshi Ootsuka (152 patents)
- Norio Ishikawa (114 patents)
- Toshihiko Ishimura (59 patents)
- Masataka Hamada (208 patents)
- Tokuji Ishida (150 patents)
- Masayuki Ueyama (54 patents)
US Patent 5214464 · Granted May 25, 1993