Granted Patent
Utility
US 5,001,502 · App. 07/517,847
Camera having film cassette hold back/film exit shade
Inventor:
Lawrence M. Douglas
Patented Case
View Patent ↗
Granted: Mar 19, 1991
Filed: May 2, 1990
Inventor
Lawrence M. Douglas
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.