Granted Patent
Utility
US 4,768,864 · App. 06/820,848
Liquid-crystal-based optical power limiter
Inventors:
Shin-Tson Wu, David M. Pepper
Patented Case
View Patent ↗
Granted: Sep 6, 1988
Filed: Jan 21, 1986
Inventors
Shin-Tson Wu
David M. Pepper
Assignee (at issue)
Hughes Aircraft Company
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.