Assignee
Inventors
- Alex Keller (30 patents)
- Joseph R. Williams (14 patents)
- Erhard A. Fechner (3 patents)
- Akiva Pinto (68 patents)
- James A. King (21 patents)
- Charles Crawford (7 patents)
- Riley C. Maness (1 patents)
US Patent 4448272 · Granted May 15, 1984