Assignee
Inventors
- Alfred A. Bien (15 patents)
- Gerald T. Niemitalo (1 patents)
- Russell A. Simms (2 patents)
- Robert Stewart (33 patents)
- Riad E. Michael (2 patents)
- Alfred W. Christenson (1 patents)
- Herbert J. Keller (2 patents)
US Patent 5061108 · Granted Oct 29, 1991