Granted Patent
Utility
US 5,222,734 · App. 07/796,791
Iron golf club heads
Inventors:
Richard E. Parente, Richard De La Cruz, Richard C. Helmstetter
Patented Case
View Patent ↗
Granted: Jun 29, 1993
Filed: Nov 22, 1991
Inventors
Richard E. Parente
Richard De La Cruz
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.