Granted Patent
Utility
US 5,301,946 · App. 07/999,250
Iron golf club head with dual intersecting recesses and associated slits
Inventors:
Glenn H. Schmidt, Richard C. Helmstetter
Patented Case
View Patent ↗
Granted: Apr 12, 1994
Filed: Jan 19, 1993
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.