ALEXANDRIA, Va., July 9 -- United States Patent no. 12,355,550, issued on July 8, was assigned to Ciena Corp. (Hanover, Md.).

"Scalable add/drop colorless, directionless, and contentionless optical architectures" was invented by Paul Chedore (Ottawa) and Jean-Luc Archambault (Ottawa).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for a scalable Reconfigurable Optical-Add Drop Multiplexer (ROADM) includes determining a plurality of channels at a ROADM node in an optical network will ingress and egress at another ROADM node in the optical network, such that the plurality of channels are able to share a same physical routing in the optical network; interfacing the plurality of channels at a degree in th...