CF Dynamic Advances LLC

CF Dynamic Advances LLC ("CF Dynamic") is a Delaware special-purpose entity whose principal place of business is New York. It has no reported operations, employees, products, or revenue. Per RPX reporting, it is described as a Fortress Investment Group LLC subsidiary (Fortress-affiliated NPE); court filings cite it as a special-purpose entity designated by DBD Credit Funding, LLC. It was created in 2017 solely to hold exclusive patent rights after Marathon Patent Group defaulted on roughly $15.99M in Fortress-backed debt and surrendered patent assets.

Products / services: None. CF Dynamic is a non-practicing entity holding an exclusive license to a single asserted patent — U.S. Patent No. 7,177,798, "Natural Language Interface Using Constrained Intermediate Dictionary of Results." The patent, claiming natural-language query processing using case-based reasoning over a metadata database, was invented at Rensselaer Polytechnic Institute (RPI) by Cheng Hsu and Veera Boonjing and assigned to RPI in 2001. RPI licensed it exclusively to Dynamic Advances LLC (an Erich Spangenberg-affiliated entity) in 2011; ownership passed through Marathon to Fortress-related entities, with the AELA transferring rights to CF Dynamic in October 2017.

Patent-litigation posture: Pure plaintiff-side NPE. The structured data shows 1 case as plaintiff, 0 as defendant, consistent with a licensing/assertion vehicle rather than an operating company. Notably, the sole tracked suit was filed in the Northern District of New York, not a plaintiff-friendly venue like the Eastern District of Texas.

Notable case: Rensselaer Polytechnic Institute et al. v. Amazon.com, Inc. (N.D.N.Y., filed May 8, 2018), alleging Amazon's Alexa Voice Software and Echo devices infringed the '798 patent. The district court granted Amazon summary judgment on March 18, 2024, holding the claims ineligible under 35 U.S.C. § 101 (Alice) and dismissing with prejudice. The Federal Circuit affirmed on February 24, 2026, awarding costs to Amazon. Standing was separately contested; CF Dynamic's ownership was also disputed in Texas/New York state litigation against Spangenberg-related entities. A related 2013 RPI/Dynamic Advances suit against Apple reportedly settled for $24.9M in 2016.