Granted Patent
Utility
US 4,948,407 · App. 07/443,808
Proton exchange method of forming waveguides in LiNbO.sub.3
Inventors:
Jeffrey B. Bindell, James T. Cargo, Ronald J. Holmes, Michael C. Hughes
Patented Case
View Patent ↗
Granted: Aug 14, 1990
Filed: Nov 29, 1989
Inventors
Jeffrey B. Bindell
James T. Cargo
Ronald J. Holmes
Michael C. Hughes
Assignee (at issue)
AT&T Bell Laboratories
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.