Granted Patent
Utility
US 4,759,596 · App. 06/645,694
Wavelength selective optical cavity including holographic filter layers
Inventors:
Hong Po, William T. Plummer
Patented Case
View Patent ↗
Granted: Jul 26, 1988
Filed: Aug 30, 1984
Inventors
Hong Po
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.