Granted Patent
Utility
US 6,564,552 · App. 09/844,177
Drift stabilizer for reciprocating free-piston devices
Inventors:
William Ward, John A. Corey, Gregory W. Swift
Patented Case
View Patent ↗
Granted: May 20, 2003
Filed: Apr 27, 2001
Inventors
William Ward
John A. Corey
Gregory W. Swift
Assignee (at issue)
THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
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.