Granted Patent
Utility
US 5,110,131 · App. 07/646,161
Positive draft golf iron
Inventor:
D. Clayton Long
Patented Case
View Patent ↗
Granted: May 5, 1992
Filed: Jan 25, 1991
Inventor
D. Clayton Long
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.