Patent 9251531
Assignment history
Inventors, original assignee, and the chain of ownership recorded with the USPTO — including the correspondent attorney who recorded each assignment, since shell-LLC chains often share one repeat-player attorney even when the entity names look unrelated. Surfaces NPE / patent-troll patterns: shell-entity transfers, known asserters in the chain, repeat correspondent fingerprints, pre-litigation assignments, and bankruptcy fire-sales.
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Ownership chain (1)
Asserters network →Structured records extracted from the assignment-history narrative below. Each entity links to its full ownership-network profile.
2013-03-08 · recorded 2014-07-11 · reel 030067/0014 · ASSIGNMENT OF ASSIGNORS INTEREST
SARKISSIAN, SHAUNT M.CORTEX MCP, INC.
Correspondent: ROBERT E. SHARKE · DENTONS US
acquisition
Assignment history
Inventors, original assignee, and the chain of ownership recorded with the USPTO — including the correspondent attorney who recorded each assignment, since shell-LLC chains often share one repeat-player attorney even when the entity names look unrelated. Surfaces NPE / patent-troll patterns: shell-entity transfers, known asserters in the chain, repeat correspondent fingerprints, pre-litigation assignments, and bankruptcy fire-sales.
Inventors
The sole named inventor for US Patent 9,251,531 is Shaunt M. Sarkissian. At the time of filing, Shaunt M. Sarkissian was the inventor and subsequently assigned his interest to Cortex MCP Inc., which is also listed as the original assignee. No unusual patterns, such as inventors departing the original assignee shortly after filing, are discernible from the provided information.
Original assignee
The original assignee named on the issued patent is Cortex MCP Inc.
Based on available information, Cortex MCP Inc. does not appear to primarily ship products embodying the claims of the patent. Instead, it is widely identified as a patent assertion entity (PAE) or Non-Practicing Entity (NPE), with its primary line of business centered on patent licensing and enforcement. The company's current status, as evidenced by ongoing litigation, is operating as a patent assertion entity.
Assignment timeline
- 2013-03-08 (executed) / recorded 2014-07-11 — Reel 030067/0014
- Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST
- Assignor: SARKISSIAN, SHAUNT M.
- Assignee: CORTEX MCP, INC.
- Correspondent: ROBERT E. SHARKE, DENTONS US LLP, P.O. BOX 1304, CHICAGO, IL 60690.
- Context: Inventor assigned patent rights to the original corporate assignee.
No further assignment records for US9251531 were found on the USPTO Patent Assignment Search beyond the initial assignment from the inventor to Cortex MCP, Inc.
Timeline diagram
timeline
title Ownership of US 9251531
2013 : Inventor assigned to Cortex MCP Inc
2016 : Issued to Cortex MCP Inc
2023 : First infringement suit filed
NPE / troll-pattern signals
- Shell-entity transfer — Not present. The only recorded assignment is from the inventor to Cortex MCP, Inc., the original corporate assignee. While Cortex MCP, Inc. itself operates as a patent assertion entity, there is no record of the patent being transferred from an operating company to a separate licensing-only shell LLC.
- Known asserter in the chain — Present. Cortex MCP Inc., the current owner of the patent (as assignee on 2014-07-11, Reel 030067/0014), is identified as a patent assertion entity by Unified Patents and RPX Corporation. It is also the plaintiff in the district court litigation involving this patent.
- Repeat correspondent across the chain — Not present. Only one assignment is recorded for this patent, from the inventor to Cortex MCP, Inc. Thus, there is no recurrence of a correspondent across the chain. The correspondent for this single assignment was ROBERT E. SHARKE of DENTONS US LLP (Reel 030067/0014).
- Cascading transfers — Not present. There is only one recorded assignment in the chain.
- Pre-litigation transfer — Not present. The assignment from the inventor to Cortex MCP, Inc. was recorded on July 11, 2014 (Reel 030067/0014). The first infringement suit, Cortex MCP, Inc. v. Visa, Inc., was filed on January 26, 2023, approximately nine years after the assignment.
- Bankruptcy fire-sale — Not present. There is no indication in the patent record or associated litigation context that the patent was acquired through bankruptcy proceedings.
- Privateering — Unclear. While Cortex MCP, Inc. is an NPE, there is no public information indicating that an operating company transferred this patent to Cortex MCP, Inc. to assert on its behalf against competitors.
- Defensive aggregator (anti-NPE) — Not present. The patent remains under the ownership of Cortex MCP, Inc., a known patent asserter, and has not been acquired by a defensive aggregator.
Verdict
NPE — high confidence
The verdict of NPE with high confidence is driven by the fact that Cortex MCP Inc., the sole corporate assignee (via assignment recorded 2014-07-11, Reel 030067/0014), is widely recognized by industry monitors like Unified Patents and RPX Corporation as a patent assertion entity. Furthermore, Cortex MCP Inc. is actively asserting this patent in litigation against Visa, Inc., as detailed in the litigation history provided.
(For verification, see USPTO Patent Assignment Search for US9251531: https://assignmentcenter.uspto.gov/patent/index.html)
Generated 5/30/2026, 6:45:53 PM