Assignee
Inventors
- George N. Tsilibes (6 patents)
- Pierce B. Day (7 patents)
- David E. Hockey (20 patents)
- Tomas Roztocil (7 patents)
- Dale R. Smith (4 patents)
- John P. Swapceinski (9 patents)
- John L. Steeves (3 patents)
US Patent 4740818 · Granted Apr 26, 1988