Granted Patent
Utility
US 4,903,007 · App. 07/362,304
Combination back-up light and sound emitting device for automotive vehicle
Inventor:
Mark Gottlieb
Patented Case
View Patent ↗
Granted: Feb 20, 1990
Filed: Jun 6, 1989
Inventor
Mark Gottlieb
Assignee (at issue)
Designtech 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.