Granted Patent
Utility
US 4,609,252 · App. 06/579,791
Organic optical waveguide device and method of making
Inventors:
Shi-Yin Wong, Gregory L. Tangonan
Patented Case
View Patent ↗
Granted: Sep 2, 1986
Filed: Feb 15, 1984
Inventors
Shi-Yin Wong
Gregory L. Tangonan
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.