Assignee
Inventors
- Peter A. Graef (24 patents)
- Colin Elston (16 patents)
- Fred E. Olmstead (4 patents)
- Clifford R. Bolstad (9 patents)
- Mark W. Bowns (5 patents)
- Frank R. Hunter (11 patents)
- Allan R. Carney (3 patents)
US Patent 6436231 · Granted Aug 20, 2002