Assignee
Inventors
- Tracy E. Grim (93 patents)
- Vincent McGinniss (1 patents)
- Kenneth E. Hughes (1 patents)
- David A. Easter (3 patents)
- Robert S. Whitmore (10 patents)
- Timothy J. Carpenter (1 patents)
- David E. Guza (3 patents)
US Patent 4996979 · Granted Mar 5, 1991