Granted Patent
Utility
US 4,374,329 · App. 06/257,095
Smoke detector with test apparatus
Inventors:
George A. Schoenfelder, Gerald D. Rork, Richard E. Hiltenbrand
Patented Case
View Patent ↗
Granted: Feb 15, 1983
Filed: Apr 24, 1981
Inventors
George A. Schoenfelder
Gerald D. Rork
Richard E. Hiltenbrand
Assignee (at issue)
Pittway Corporation
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.