Granted Patent
Utility
US 4,418,993 · App. 06/261,302
Stereoscopic zoom lens system for three-dimensional motion pictures and television
Inventor:
Lenny Lipton
Patented Case
View Patent ↗
Granted: Dec 6, 1983
Filed: May 7, 1981
Inventor
Lenny Lipton
Assignee (at issue)
Stereographics 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.