Granted Patent
Utility
US 4,412,603 · App. 06/334,706
Dual pressure, dual piston actuator
Inventor:
Andrea L. Bischoff
Patented Case
View Patent ↗
Granted: Nov 1, 1983
Filed: Dec 28, 1981
Inventor
Andrea L. Bischoff
Assignee (at issue)
Goodyear Aerospace Corporation
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.