Granted Patent
Utility
US 4,492,987 · App. 06/360,468
Processor for enhancing video signals for photographic reproduction
Inventors:
James L. Burkhardt, John McCann
Patented Case
View Patent ↗
Granted: Jan 8, 1985
Filed: Mar 22, 1982
Inventors
James L. Burkhardt
John McCann
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.