Granted Patent
Utility
US 4,898,443 · App. 07/289,396
Coherent mixing of optical signals
Inventors:
Richard E. Epworth, Stephen Wright, Terry Bricheno
Patented Case
View Patent ↗
Granted: Feb 6, 1990
Filed: Dec 19, 1988
Inventors
Richard E. Epworth
Stephen Wright
Terry Bricheno
Assignee (at issue)
STC PLC
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.