Granted Patent
Utility
US 4,439,004 · App. 06/437,079
Optical waveguide and modulator and process for fabricating same
Inventors:
Robert G. Hunsperger, Gordon A. Shifrin
Patented Case
View Patent ↗
Granted: Mar 27, 1984
Filed: Oct 27, 1982
Inventors
Robert G. Hunsperger
Gordon A. Shifrin
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.