Granted Patent
Utility
US 4,727,989 · App. 07/006,865
Automatic tie plate orientation sensing system
Inventors:
Dennis J. Cotic, Andrew M. Dieringer
Patented Case
View Patent ↗
Granted: Mar 1, 1988
Filed: Jan 27, 1987
Inventors
Dennis J. Cotic
Andrew M. Dieringer
Assignee (at issue)
REXNORD GMBH
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.