Granted Patent
Utility
US 6,007,433 · App. 09/054,155
Sole configuration for golf club head
Inventors:
Richard C. Helmstetter, D. Clayton Evans
Patented Case
View Patent ↗
Granted: Dec 28, 1999
Filed: Apr 2, 1998
Inventors
Richard C. Helmstetter
D. Clayton Evans
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.