Granted Patent
Utility
US 4,871,220 · App. 07/206,793
Short wavelength pass filter having a metal mesh on a semiconducting substrate
Inventor:
Margaret Kohin
Patented Case
View Patent ↗
Granted: Oct 3, 1989
Filed: Jun 15, 1988
Inventor
Margaret Kohin
Assignee (at issue)
Litton Systems, 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.