Granted Patent
Utility
US 4,742,338 · App. 06/864,811
Intruder alarm system
Inventor:
Roy Baxendale
Patented Case
View Patent ↗
Granted: May 3, 1988
Filed: May 19, 1986
Inventor
Roy Baxendale
Assignee (at issue)
GEC Avionics Limited
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.