Granted Patent
Utility
US 5,051,617 · App. 07/545,497
Multilayer semiconductor waveguide device for sum frequency generation from contra-propagating beams
Inventors:
Richard J. F. Normandin, Francoise Chatenoud, Robin Williams
Patented Case
View Patent ↗
Granted: Sep 24, 1991
Filed: Jun 29, 1990
Inventors
Richard J. F. Normandin
Francoise Chatenoud
Robin Williams
Assignee (at issue)
NATIONAL RESEARCH COUNCIL OF CANADA
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.