Granted Patent
Utility
US 4,647,975 · App. 06/792,768
Exposure control system for an electronic imaging camera having increased dynamic range
Inventors:
Lawrence E. Alston, Donald S. Levinstone, William T. Plummer
Patented Case
View Patent ↗
Granted: Mar 3, 1987
Filed: Oct 30, 1985
Inventors
Lawrence E. Alston
Donald S. Levinstone
William T. Plummer
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.