Granted Patent
Utility
US 4,300,878 · App. 06/181,588
Extrusion die for forming composite rubber-cord strip
Inventor:
Donald G. Ible
Patented Case
View Patent ↗
Granted: Nov 17, 1981
Filed: Aug 27, 1980
Inventor
Donald G. Ible
Assignee (at issue)
The Firestone Tire & Rubber 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.