IP Library › Granted Patent US 4,422,384
Granted Patent Utility
US 4,422,384 · App. 06/274,091

All position tractor

Inventors: David E. Johnson, Kenneth E. McCall, William J. Coughlin
Patented Case View Patent ↗
Granted: Dec 27, 1983 Filed: Jun 16, 1981
Inventors
David E. Johnson
Kenneth E. McCall
William J. Coughlin
Assignee (at issue)
Arcair Company

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Quick Facts
Patent No.
US 4,422,384
App. No.
06/274,091
Filed
1981-06-16
Granted
1983-12-27
Kind
A