Granted Patent
Utility
US 4,290,470 · App. 06/127,655
Porous tire tread and method of bonding discrete particles to form same
Inventors:
Arthur R. Williams, Gareth Williams
Patented Case
View Patent ↗
Granted: Sep 22, 1981
Filed: Mar 6, 1980
Inventors
Arthur R. Williams
Gareth Williams
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.