Granted Patent
Utility
US 4,993,797 · App. 07/533,831
Optical fibre lattice signal processors
Inventors:
Christopher J. Groves-Kirby, Douglas Charles John Reid
Patented Case
View Patent ↗
Granted: Feb 19, 1991
Filed: Jun 6, 1990
Inventors
Christopher J. Groves-Kirby
Douglas Charles John Reid
Assignee (at issue)
Plessey Research Caswell Limited
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.