Granted Patent
Utility
US 4,183,214 · App. 05/793,915
Spring and resonant system for free-piston Stirling engines
Inventors:
William T. Beale, James Gary Wood, David R. Gedeon
Patented Case
View Patent ↗
Granted: Jan 15, 1980
Filed: May 5, 1977
Inventors
William T. Beale
James Gary Wood
David R. Gedeon
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.