Granted Patent
Utility
US 5,163,682 · App. 07/751,921
Metal wood golf club with variable faceplate thickness
Inventors:
Glenn H. Schmidt, Richard C. Helmstetter
Patented Case
View Patent ↗
Granted: Nov 17, 1992
Filed: Sep 4, 1991
Inventors
Glenn H. Schmidt
Richard C. Helmstetter
Assignee (at issue)
Callaway Golf Company
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.