Granted Patent
Utility
US 5,075,769 · App. 07/138,825
Video identification card system
Inventors:
Janet Allen, David Bruce Walker
Patented Case
View Patent ↗
Granted: Dec 24, 1991
Filed: Dec 28, 1987
Inventors
Janet Allen
David Bruce Walker
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.