Granted Patent
Utility
US 4,773,720 · App. 06/869,913
Optical waveguide
Inventor:
Jacob M. Hammer
Patented Case
View Patent ↗
Granted: Sep 27, 1988
Filed: Jun 3, 1986
Inventor
Jacob M. Hammer
Assignee (at issue)
General Electric 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.