Assignee
Inventors
- Thomas C. Christensen (12 patents)
- Jonathan Darrel Coker (68 patents)
- Earl A. Cunningham (48 patents)
- Richard C. Jaworski (6 patents)
- Gregory Kerwin (7 patents)
- Dean C. Palmer (5 patents)
- Jeffrey R. Roepke (1 patents)
US Patent 4821125 · Granted Apr 11, 1989