Granted Patent
Utility
US 4,416,316 · App. 06/241,222
Tire treads and tires
Inventors:
Michael Clatworthy, William P. S. Mack, Douglas J. Major
Patented Case
View Patent ↗
Granted: Nov 22, 1983
Filed: Mar 6, 1981
Inventors
Michael Clatworthy
William P. S. Mack
Douglas J. Major
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.