Granted Patent
Utility
US 4,309,936 · App. 06/034,415
Stacker with improved hydraulic cylinder movement
Inventors:
William J. Eberle, Robert J. Mills
Patented Case
View Patent ↗
Granted: Jan 12, 1982
Filed: Apr 30, 1979
Inventors
William J. Eberle
Robert J. Mills
Assignee (at issue)
General Battery 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.