Granted Patent
Utility
US 4,386,921 · App. 06/344,678
Metal power transmission belt
Inventor:
Richard W. Roberts
Patented Case
View Patent ↗
Granted: Jun 7, 1983
Filed: Feb 1, 1982
Inventor
Richard W. Roberts
Assignee (at issue)
BorgWarner Inc.
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.