Assignee
Inventors
- Dean A. Ersfeld (20 patents)
- Unknown
- Matthew T. Scholz (185 patents)
- Dennis C. Bartizal (14 patents)
- Katherine E. Reed (6 patents)
- Wayne K. Larson (21 patents)
- Timothy C. Sandvig (20 patents)
- Richard S. Buckanin (26 patents)
US Patent 4856502 · Granted Aug 15, 1989