Granted Patent
Utility
US 4,206,366 · App. 05/949,090
Optical smoke detector
Inventors:
Angelo A. Marsocci, Robert B. Powers, Hugh D. Dyer
Patented Case
View Patent ↗
Granted: Jun 3, 1980
Filed: Oct 6, 1978
Inventors
Angelo A. Marsocci
Robert B. Powers
Hugh D. Dyer
Assignee (at issue)
American District Telegraph 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.