Granted Patent
Utility
US 5,722,239 · App. 08/806,611
Stirling engine
Inventor:
William H. Houtman
Patented Case
View Patent ↗
Granted: Mar 3, 1998
Filed: Feb 26, 1997
Inventor
William H. Houtman
Assignee (at issue)
Stirling Thermal Motors, Inc.
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.