Granted Patent
Utility
US 4,087,156 · App. 05/630,118
Optical fiber transmission mixer and method of making same
Inventors:
Charles K. Kao, James E. Goell
Patented Case
View Patent ↗
Granted: May 2, 1978
Filed: Nov 7, 1975
Inventors
Charles K. Kao
James E. Goell
Assignee (at issue)
International Telephone and Telegraph Corporation
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.