Assignee
Inventors
- Gerald E. Roberts (18 patents)
- John Russell Lane (11 patents)
- John Poirier (7 patents)
- Unknown
- Unknown
- Johannes J. Vandegraaf (11 patents)
- Jeff Johnson (5 patents)
- David C. Bing (3 patents)
- Unknown
US Patent 6219531 · Granted Apr 17, 2001