Granted Patent
Utility
US 4,217,771 · App. 06/009,264
Method of cold forming
Inventor:
Frederick W. Braun
Patented Case
View Patent ↗
Granted: Aug 19, 1980
Filed: Feb 2, 1979
Inventor
Frederick W. Braun
Assignee (at issue)
Braun Engineering 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.