Assignee
Inventors
- William D. Corfits (6 patents)
- John Theodore Gullicksrud (4 patents)
- Bradley L. Martin (4 patents)
- Robert W. McCutcheon (1 patents)
- Jerry R. Rasmussen (6 patents)
- Gordon W. Westphal (3 patents)
- Stephen E. Wheeler (9 patents)
US Patent 4853830 · Granted Aug 1, 1989