Granted Patent
Utility
US 4,289,381 · App. 06/054,361
High selectivity thin film polarizer
Inventors:
Hugh L. Garvin, Douglas A. Pinnow
Patented Case
View Patent ↗
Granted: Sep 15, 1981
Filed: Jul 2, 1979
Inventors
Hugh L. Garvin
Douglas A. Pinnow
Assignee (at issue)
Hughes Aircraft 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.