Granted Patent
Utility
US 4,248,046 · App. 06/032,138
Vent accumulator for hydraulic integrator
Inventor:
Robert M. Fornell
Patented Case
View Patent ↗
Granted: Feb 3, 1981
Filed: Apr 23, 1979
Inventor
Robert M. Fornell
Assignee (at issue)
Unit Rig & Equipment
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.