Granted Patent
Utility
US 4,408,418 · App. 06/314,688
Method of forming through-feed cylindrical thread rolling dies
Inventor:
Richard H. Corrette
Patented Case
View Patent ↗
Granted: Oct 11, 1983
Filed: Oct 26, 1981
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.