Granted Patent
Utility
US 4,753,707 · App. 07/035,679
Twin rotary drum tire manufacturing unit
Inventor:
William Crombie
Patented Case
View Patent ↗
Granted: Jun 28, 1988
Filed: Apr 7, 1987
Inventor
William Crombie
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.