Matthew S. Dontzin

I'll research this attorney before drafting.

Let me dig into the specific patent matters referenced.

A couple more targeted searches to pin down the second case and PTAB involvement.

Matthew S. Dontzin — patent litigation summary

Focus areas. Dontzin is a commercial trial lawyer rather than a dedicated patent litigator; his patent docket is small (two tracked defense-side appearances) and sits inside a broader practice in complex commercial and international litigation, white-collar defense, and art law. The patent work that is publicly documented is financial-services technology — network-intrusion detection and data encryption. In Intellectual Ventures II LLC v. JPMorgan Chase & Co., No. 13-cv-03777 (S.D.N.Y.), Dontzin was named among counsel defending JPMorgan Chase against five Intellectual Ventures patents covering network security monitoring and cryptography, including the "crypto-engine" co-processor patent (U.S. 7,634,666) asserted against IBM cryptographic coprocessor cards. No Wi-Fi/standard-essential, pharmaceutical, software-licensing, or mechanical patent matters appear in the tracked list or in searchable public records for him.

Side preference. Both tracked appearances are defense-side (0 plaintiff / 2 defendant), and the verifiable patent work is representation of an operating company — JPMorgan Chase — against an assertion entity (Intellectual Ventures, the largest NPE by assertion volume). The source data records one matter as lead trial counsel and one as local counsel; it does not identify which docket carries which role. In the IV/JPMorgan matter DNF appeared alongside out-of-town lead firms (Durie Tangri, Kirkland & Ellis), which is consistent with a local-counsel or co-counsel position there, but that mapping is an inference, not confirmed by the data.

Firm context. Dontzin is the founding partner of Dontzin Nagy & Fleissig LLP, a roughly 15-lawyer litigation boutique in New York. No prior firm appears in his patent docket; his career practice has been at DNF (with earlier work in commercial and criminal defense litigation). The firm's patent bench includes Tibor L. Nagy, Jr. and Gregory N. Wolfe, who signed the claim-construction submissions and related filings in the IV matter.

Notable patent outcomes. In the IV/JPMorgan case, Judge Alvin Hellerstein invalidated three of the five asserted patents under 35 U.S.C. §101 (post-Alice) in April 2015, and JPMorgan twice defeated summary judgment of non-infringement on the '666 crypto-engine patent (2015 and 2016); Dontzin is listed as counsel for the JPMorgan appellants on the Federal Circuit certificate of interest. A firm resume separately claims invalidating three patents and securing voluntary dismissal of a fourth against "the largest patent troll operating in the U.S.," a description that corresponds to this engagement, though the resume bullet is attributed to partner Gregory N. Wolfe, not Dontzin. Outside patent law, his best-documented trial result is the art-authentication defense in Fletcher v. Doig (N.D. Ill.) — an eight-day bench trial win followed by a sanctions award of roughly $2.5 million against plaintiffs and their counsel — noted here only as non-patent trial context.

PTAB / IPR. No evidence was located that Dontzin personally appears as a named practitioner in PTAB proceedings. The IPRs and CBM review on the IV patents (e.g., IPR2014-00672, IPR2014-00673, IPR2015-01323, CBM2014-00157) were filed by the JPMorgan defense team, with DNF's Tibor L. Nagy, Jr. and Jason A. Kolbe signing the related papers. His PTAB experience therefore appears to be firm-level rather than individual; he should not be characterized as a regular IPR practitioner on this record.

Bar / education. Admitted to practice in New York in 1984; J.D., New York University School of Law (1983); B.A., Hampshire College. (Sourced from Super Lawyers and a published professional bio.)