Granted Patent
Utility
US 4,726,653 · App. 06/866,138
Stereoscopic viewer
Inventors:
Martin Thaler, Alan G. Lewis, David M. Gresham
Patented Case
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Granted: Feb 23, 1988
Filed: May 22, 1986
Inventors
Martin Thaler
Alan G. Lewis
David M. Gresham
Assignee (at issue)
View-Master Ideal Group, 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.