Granted Patent
Utility
US 4,429,530 · App. 06/345,312
Hermetically sealed transmission system for a free piston Stirling engine
Inventor:
William T. Beale
Patented Case
View Patent ↗
Granted: Feb 7, 1984
Filed: Feb 3, 1982
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.