Granted Patent
Utility
US 4,553,134 · App. 06/452,734
Electrical alarm system for installation in a window casing
Inventor:
William Holt
Patented Case
View Patent ↗
Granted: Nov 12, 1985
Filed: Dec 23, 1982
Inventor
William Holt
Assignee (at issue)
Alarm Accessory, Ltd.
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.