Granted Patent
Utility
US 5,651,409 · App. 08/612,781
Investment casting gating for metal wood golf club heads
Inventor:
John Sheehan
Patented Case
View Patent ↗
Granted: Jul 29, 1997
Filed: Mar 8, 1996
Inventor
John Sheehan
Assignee (at issue)
Niemin Porter & Co.
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.