Assignee
Inventors
- Richard L. Walker (11 patents)
- Deryck H. Read (2 patents)
- David W. Hird (2 patents)
- Rance B. Lefebvre (4 patents)
- Steven L. Berry (2 patents)
- James S. Cullor (10 patents)
- Hank M. Lefler (2 patents)
US Patent 6287575 · Granted Sep 11, 2001