Fed. Circ. Backs Cisco's PTAB Win On Phone Network Patent

Law360, New York (November 30, 2017, 9:21 PM EST) -- The Federal Circuit on Thursday affirmed a U.S. Patent Trial and Appeal Board decision invalidating AIP Acquisition LLC’s network-based voice communications patent claims that it asserted against Cisco Systems Inc., saying the board’s construction was backed up by both intrinsic and extrinsic evidence.

The three-judge panel disagreed with AIP's argument that the PTAB wrongly relied on extrinsic evidence to conclude that the terms “internet protocol” and “Internet protocol,” with a capital “I,” weren’t limited to the particular protocol used in the patent’s technology, called TCP/IP.

Specifically, AIP contended that the two terms should receive the same construction and urged the appeals...

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