Granted Patent
Utility
US 4,849,821 · App. 07/131,613
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Inventors:
James D. Allen, IV, John R. Thompson
Patented Case
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Granted: Jul 18, 1989
Filed: Dec 11, 1987
Inventors
James D. Allen, IV
John R. Thompson
Assignee (at issue)
EASTMAN KODAK COMPANY
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.