Granted Patent
Utility
US 4,812,864 · App. 07/155,990
Camera and two-element viewfinder
Inventor:
James Baker
Patented Case
View Patent ↗
Granted: Mar 14, 1989
Filed: Feb 16, 1988
Inventor
James Baker
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.