Granted Patent
Utility
US 4,730,301 · App. 06/811,775
Wavelength multiplexed optical communications system and method
Inventor:
Donald H. McMahon
Patented Case
View Patent ↗
Granted: Mar 8, 1988
Filed: Dec 20, 1985
Inventor
Donald H. McMahon
Assignee (at issue)
Polaroid 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.