Granted Patent
Utility
US 6,409,232 · App. 09/569,846
Exit alarm lock assembly with push pad pivotally interconnected to deadbolt
Inventors:
Daniel N. Nigro, Jr., Eugene Karl Siller
Patented Case
View Patent ↗
Granted: Jun 25, 2002
Filed: May 12, 2000
Inventors
Daniel N. Nigro, Jr.
Eugene Karl Siller
Assignee (at issue)
Von Duprin LLC
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.