Granted Patent
Utility
US 4,965,868 · App. 07/365,391
Electromagnetic polarization selector
Inventors:
Mon N. Wong, Gregory D. Kroupa
Patented Case
View Patent ↗
Granted: Oct 23, 1990
Filed: Jun 13, 1989
Inventors
Mon N. Wong
Gregory D. Kroupa
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.