Granted Patent
Utility
US 4,319,934 · App. 06/160,449
Method of forming tools from alloy steel for severe cold forming
Inventor:
Gary S. Henning
Patented Case
View Patent ↗
Granted: Mar 16, 1982
Filed: Jun 18, 1980
Inventor
Gary S. Henning
Assignee (at issue)
Snap-on Tools 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.