Assignee
Inventors
- Norio Ishikawa (114 patents)
- Masaaki Nakai (143 patents)
- Masayasu Hirano (26 patents)
- Akihiko Fujino (69 patents)
- Hiroshi Ootsuka (152 patents)
- Takeshi Egawa (51 patents)
- Kunio Kawamura (36 patents)
US Patent 5140361 · Granted Aug 18, 1992