Granted Patent
Utility
US 4,708,053 · App. 06/797,506
Reciprocating piston fluid powered motor
Inventors:
Alan K. Forsythe, Richard J. Frigon
Patented Case
View Patent ↗
Granted: Nov 24, 1987
Filed: Nov 13, 1985
Inventors
Alan K. Forsythe
Richard J. Frigon
Assignee (at issue)
Sprague Devices, 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.