Granted Patent
Utility
US 4,047,446 · App. 05/696,108
Endless power transmission belt
Inventor:
Billy L. Speer
Patented Case
View Patent ↗
Granted: Sep 13, 1977
Filed: Jun 14, 1976
Inventor
Billy L. Speer
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.