Assignee
Inventors
- Mark D. Braine (7 patents)
- Ralph Kirby (7 patents)
- Donald W. Schultz (7 patents)
- Richard G. Tuttle (6 patents)
- Nelson M. Ferg (5 patents)
- John B. Hickman (21 patents)
- William C. Webb (7 patents)
US Patent 4964248 · Granted Oct 23, 1990