Granted Patent
Utility
US 5,003,386 · App. 07/447,994
Preparation of a copy hologram with a light modulating array derived from a master hologram
Inventors:
James Doyle, Antony I. Hopwood
Patented Case
View Patent ↗
Granted: Mar 26, 1991
Filed: Dec 8, 1989
Inventors
James Doyle
Antony I. Hopwood
Assignee (at issue)
Ilford AG
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.