Granted Patent
Utility
US 6,155,943 · App. 09/153,317
Randomized sprocket for roller chain
Inventors:
Timothy J. Ledvina, John Hummel
Patented Case
View Patent ↗
Granted: Dec 5, 2000
Filed: Sep 15, 1998
Inventors
Timothy J. Ledvina
John Hummel
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.