Granted Patent
Utility
US 4,769,300 · App. 06/940,048
A method of preparing a hologram having an increased replay wavelength and resulting hologram
Inventor:
David W. Butcher
Patented Case
View Patent ↗
Granted: Sep 6, 1988
Filed: Dec 10, 1986
Inventor
David W. Butcher
Assignee (at issue)
Ciba-Geigy
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.