Granted Patent
Utility
US 4,496,216 · App. 06/454,728
Method and apparatus for exposing photosensitive material
Inventor:
James J. Cowan
Patented Case
View Patent ↗
Granted: Jan 29, 1985
Filed: Dec 30, 1982
Inventor
James J. Cowan
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.