Granted Patent
Utility
US 4,555,720 · App. 06/463,210
Infra-red radiation detectors and their manufacture
Inventor:
John B. Readhead
Patented Case
View Patent ↗
Granted: Nov 26, 1985
Filed: Feb 2, 1983
Inventor
John B. Readhead
Assignee (at issue)
U.S. Philips 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.