Granted Patent
Utility
US 4,412,418 · App. 06/265,030
Hydrodynamic lubrication system for piston devices particularly Stirling engines
Inventor:
William T. Beale
Patented Case
View Patent ↗
Granted: Nov 1, 1983
Filed: May 18, 1981
Inventor
William T. Beale
Assignee (at issue)
SUNPOWER 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.