Granted Patent
Utility
US 4,295,630 · App. 06/065,368
Fail-safe actuator and hydraulic system incorporating the same
Inventors:
Lorin P. Card, Otto W. Borsting
Patented Case
View Patent ↗
Granted: Oct 20, 1981
Filed: Aug 9, 1979
Inventors
Lorin P. Card
Otto W. Borsting
Assignee (at issue)
Greer Hydraulics, Incorporated
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.