Granted Patent
Utility
US 4,690,664 · App. 06/725,966
Toothed belt
Inventor:
Robert E. Wetzel
Patented Case
View Patent ↗
Granted: Sep 1, 1987
Filed: Apr 22, 1985
Inventor
Robert E. Wetzel
Assignee (at issue)
Dayco Products, LLC
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.