Granted Patent
Utility
US 5,143,207 · App. 07/712,087
Tension controlling and shock absorbing apparatus for an endless conveyor
Inventor:
David M. Pruett
Patented Case
View Patent ↗
Granted: Sep 1, 1992
Filed: Jun 6, 1991
Inventor
David M. Pruett
Assignee (at issue)
Portec, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.