Granted Patent
Utility
US 4,469,877 · App. 06/475,222
Photographic products
Inventors:
Alan L. Borror, Ernest W. Ellis
Patented Case
View Patent ↗
Granted: Sep 4, 1984
Filed: Mar 14, 1983
Inventors
Alan L. Borror
Ernest W. Ellis
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.