Granted Patent
Utility
US 4,414,047 · App. 06/272,637
Method of making an endless power transmission belt
Inventors:
Robert E. Wetzel, Richard L. Marsh
Patented Case
View Patent ↗
Granted: Nov 8, 1983
Filed: Jun 11, 1981
Inventors
Robert E. Wetzel
Richard L. Marsh
Assignee (at issue)
DayCo Holdings, LP
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.