Granted Patent
Utility
US 5,282,625 · App. 07/921,857
Iron golf club head with dual intersecting recesses
Inventors:
Glenn H. Schmidt, Richard C. Helmstetter
Patented Case
View Patent ↗
Granted: Feb 1, 1994
Filed: Aug 5, 1992
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.