Granted Patent
Utility
US 4,736,098 · App. 06/827,439
Signalling method and apparatus for a conventional shopping cart
Inventor:
Houston Rehrig
Patented Case
View Patent ↗
Granted: Apr 5, 1988
Filed: Feb 10, 1986
Inventor
Houston Rehrig
Assignee (at issue)
Rehrig International, 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.