Assignee
Inventors
- Andrew G. Butler (14 patents)
- Eugene F. Duval (79 patents)
- Gregory L. Richards (4 patents)
- Mitchell C. Barham (25 patents)
- Daniel T. Adams (31 patents)
- William A. Scott (39 patents)
- David C. Shafer (53 patents)
US Patent 5680208 · Granted Oct 21, 1997