Assignee
Inventors
- Billy B. Hibbard (3 patents)
- Joe A. Mann (5 patents)
- Frans P. P. Koeleveld (2 patents)
- Agnes Potepan (4 patents)
- Richard E. White (37 patents)
- Barry T. Knight (2 patents)
- Howard Bryant (3 patents)
US Patent 4837281 · Granted Jun 6, 1989