Granted Patent
Utility
US 4,509,937 · App. 06/546,667
Power transmission chain
Inventors:
Timothy J. Ledvina, Robert H. Mead
Patented Case
View Patent ↗
Granted: Apr 9, 1985
Filed: Oct 28, 1983
Inventors
Timothy J. Ledvina
Robert H. Mead
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.