Assignee
Inventors
- Albert F. Stevens (18 patents)
- Mark A. Stevens (20 patents)
- Robert R. DeWitt (85 patents)
- William R. Lile (17 patents)
- Michael E. York (20 patents)
- Jeffrey L. Chodack (10 patents)
- Roy E. Patterson (5 patents)
US Patent 5842693 · Granted Dec 1, 1998