Granted Patent
Utility
US 4,519,654 · App. 06/563,335
Roller suspension apparatus for a belted vehicle
Inventors:
Ronald L. Satzler, Samuel B. Stevens
Patented Case
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Granted: May 28, 1985
Filed: Dec 20, 1983
Inventors
Ronald L. Satzler
Samuel B. Stevens
Assignee (at issue)
Caterpillar Tractor Co.
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.