Granted Patent
Utility
US 5,160,142 · App. 07/804,864
Golf putting training device
Inventor:
Perry C. Marshall
Patented Case
View Patent ↗
Granted: Nov 3, 1992
Filed: Dec 6, 1991
Inventor
Perry C. Marshall
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.