Granted Patent
Utility
US 4,753,520 · App. 06/931,069
Compound catoptric cartesian ovoid lens
Inventor:
David E. Silverglate
Patented Case
View Patent ↗
Granted: Jun 28, 1988
Filed: Nov 17, 1986
Inventor
David E. Silverglate
Assignee (at issue)
General Instrument 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.