Assignee
Inventors
- Robert B. Edwards, II (15 patents)
- Bruce H. Dalrymple (9 patents)
- Lawrence H. Long (1 patents)
- Paul Meisner (1 patents)
- Forrest C. Bacon (14 patents)
- Dale E. Pribbernow (2 patents)
- William L. Warner (4 patents)
US Patent 4821820 · Granted Apr 18, 1989