Granted Patent
Utility
US 4,455,487 · App. 06/316,923
Fire detection system with IR and UV ratio detector
Inventor:
Roger A. Wendt
Patented Case
View Patent ↗
Granted: Jun 19, 1984
Filed: Oct 30, 1981
Inventor
Roger A. Wendt
Assignee (at issue)
Armtec Industries Inc.
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.