Granted Patent
Utility
US 4,320,790 · App. 06/125,583
Tire treads
Inventors:
Michael R. Corner, Barry J. Allbert
Patented Case
View Patent ↗
Granted: Mar 23, 1982
Filed: Feb 28, 1980
Inventors
Michael R. Corner
Barry J. Allbert
Assignee (at issue)
Dunlop GmbH
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.