Granted Patent
Utility
US 4,855,723 · App. 07/187,934
Audio-visual alarm system with address display
Inventors:
Marlene Fritz, Betty J. Love, Mary Sweeney, Chuck Davis
Patented Case
View Patent ↗
Granted: Aug 8, 1989
Filed: Apr 29, 1988
Inventors
Marlene Fritz
Betty J. Love
Mary Sweeney
Chuck Davis
Assignee (at issue)
Proto Quick, 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.