Granted Patent
Utility
US 4,701,619 · App. 06/842,590
Pyroelectric detectors
Inventor:
Christopher Frederick Carter
Patented Case
View Patent ↗
Granted: Oct 20, 1987
Filed: Mar 21, 1986
Inventor
Christopher Frederick Carter
Assignee (at issue)
Plessey Overseas Limited
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.