Granted Patent
Utility
US 4,888,951 · App. 07/376,231
Phase synchronization and vibration cancellation for free piston Stirling machines
Inventor:
William T. Beale
Patented Case
View Patent ↗
Granted: Dec 26, 1989
Filed: Jul 3, 1989
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.