Granted Patent
Utility
US 4,816,360 · App. 06/940,050
Multicolor holograms using gelatin as the binder and method for producing the same
Inventors:
James Doyle, David W. Butcher, John A. Clark
Patented Case
View Patent ↗
Granted: Mar 28, 1989
Filed: Dec 10, 1986
Inventors
James Doyle
David W. Butcher
John A. Clark
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.