Granted Patent
Utility
US 4,258,357 · App. 06/051,184
Alarm signalling systems
Inventor:
Leslie J. Browell
Patented Case
View Patent ↗
Granted: Mar 24, 1981
Filed: Jun 22, 1979
Inventor
Leslie J. Browell
Assignee (at issue)
Plessey Handel Und Investments AG
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.