Granted Patent
Utility
US 4,690,512 · App. 06/695,238
Composite lens assembly
Inventor:
Robert P. Forsyth
Patented Case
View Patent ↗
Granted: Sep 1, 1987
Filed: Jan 28, 1985
Inventor
Robert P. Forsyth
Assignee (at issue)
Polaroid 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.