Assignee
Inventors
- Billy T. Upchurch (12 patents)
- Irvin M. Miller (6 patents)
- David R. Brown (12 patents)
- Patricia P. Davis (5 patents)
- David R. Schryer (11 patents)
- Kenneth G. Brown (15 patents)
- John D. Van Norman (2 patents)
US Patent 4912082 · Granted Mar 27, 1990