Granted Patent
Utility
US 4,375,322 · App. 06/262,501
Full range variable proportional fill flash system
Inventors:
Richard J. Coppa, Marie T. Rodriguez
Patented Case
View Patent ↗
Granted: Mar 1, 1983
Filed: May 11, 1981
Inventors
Richard J. Coppa
Marie T. Rodriguez
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.