Granted Patent
Utility
US 5,588,922 · App. 08/354,486
Iron golf club head with forwardly divergent interior recess
Inventors:
Glenn H. Schmidt, Richard C. Helmstetter
Patented Case
View Patent ↗
Granted: Dec 31, 1996
Filed: Dec 12, 1994
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.