Granted Patent
Utility
US 5,345,289 · App. 08/118,420
Film cassette dark slide incorporating a projection for restraining impact-generated movement
Inventor:
Irving S. Lippert
Patented Case
View Patent ↗
Granted: Sep 6, 1994
Filed: Sep 8, 1993
Inventor
Irving S. Lippert
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.