Granted Patent
Utility
US 4,348,087 · App. 06/250,853
Photographic system for automatically charging electronic flash
Inventors:
Seymour Ellin, John W. Stempeck
Patented Case
View Patent ↗
Granted: Sep 7, 1982
Filed: Apr 3, 1981
Inventors
Seymour Ellin
John W. Stempeck
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.