Granted Patent
Utility
US 4,987,567 · App. 07/274,242
Optical wavelength multiplexer/demultiplexer and demultiplexer/remultiplexer
Inventor:
Carl F. Buhrer
Patented Case
View Patent ↗
Granted: Jan 22, 1991
Filed: Nov 21, 1988
Inventor
Carl F. Buhrer
Assignee (at issue)
GTE Laboratories Incorporated
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.