Granted Patent
Utility
US 5,189,464 · App. 07/809,330
Supplemental lens positioning system for a fixed focus lens camera
Inventors:
David L. Farrington, Norman D. Staller, Jon Van Tassell
Patented Case
View Patent ↗
Granted: Feb 23, 1993
Filed: Dec 18, 1991
Inventors
David L. Farrington
Norman D. Staller
Jon Van Tassell
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.