Granted Patent
Utility
US 6,642,849 · App. 10/014,686
Hush disable feature for photoelectric smoke alarm
Inventor:
Thomas W. Kondziolka
Patented Case
View Patent ↗
Granted: Nov 4, 2003
Filed: Dec 11, 2001
Inventor
Thomas W. Kondziolka
Assignee (at issue)
Maple Chase Company
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.