Granted Patent
Utility
US 6,662,639 · App. 10/235,799
Secondary ignition pickup and method
Inventors:
William W. Wittliff, III, John Chapin, Robert L. Guiter, Dale Boysen
Patented Case
View Patent ↗
Granted: Dec 16, 2003
Filed: Sep 6, 2002
Inventors
William W. Wittliff, III
John Chapin
Robert L. Guiter
Dale Boysen
Assignee (at issue)
SPX 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.