Granted Patent
Utility
US 4,540,263 · App. 06/619,602
Film processor having a loading door interlock
Inventor:
G. Richard Kramer
Patented Case
View Patent ↗
Granted: Sep 10, 1985
Filed: Jun 11, 1984
Inventor
G. Richard Kramer
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.