Assignee
Inventors
- Kenichi Urushibata (7 patents)
- Keiichi Kojima (17 patents)
- Kiyoto Sugawara (4 patents)
- Tatsuo Matsuda (18 patents)
- Haruo Saen (14 patents)
- Tetsuo Yumoto (12 patents)
- Norio Yoshizawa (4 patents)
- Tooru Kanno (3 patents)
US Patent 5045641 · Granted Sep 3, 1991