Granted Patent
Utility
US 4,573,376 · App. 06/558,946
Method of producing thread rolling die
Inventor:
Richard H. Corrette
Patented Case
View Patent ↗
Granted: Mar 4, 1986
Filed: Dec 7, 1983
Inventor
Richard H. Corrette
Assignee (at issue)
Colt Industries Operating Corporation
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.