Granted Patent
Utility
US 5,675,320 · App. 08/522,716
Glass break detector
Inventors:
Dennis Cecic, Hartwell Fong
Patented Case
View Patent ↗
Granted: Oct 7, 1997
Filed: Sep 1, 1995
Inventors
Dennis Cecic
Hartwell Fong
Assignee (at issue)
Digital Security Controls 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.