Granted Patent
Utility
US 5,136,677 · App. 07/711,627
Photorefractive effect in bulk chalcogenide glass and devices made therefrom
Inventors:
Martin G. Drexhage, Lee Melbourne Cook, Tracey L. Margraf, Cornelius T. Moynihan
Patented Case
View Patent ↗
Granted: Aug 4, 1992
Filed: Jun 6, 1991
Inventors
Martin G. Drexhage
Lee Melbourne Cook
Tracey L. Margraf
Cornelius T. Moynihan
Assignee (at issue)
Galileo Electro-Optics 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.