Granted Patent
Utility
US 5,642,884 · App. 08/624,877
Holographic image reconstruction puzzle
Inventor:
David E. Pitcher
Patented Case
View Patent ↗
Granted: Jul 1, 1997
Filed: Mar 27, 1996
Inventor
David E. Pitcher
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.