Dacus Firm

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The Dacus Firm, P.C. — Patent Litigation Practice Summary

Firm overview. The Dacus Firm, P.C. is a Tyler, Texas litigation boutique headquartered at 821 ESE Loop 323, Suite 430, that has practiced in East Texas since 1997. It is not BigLaw and does not appear in the AmLaw 100/200; Chambers USA describes it as "a noted trial lawyer boutique based in the Eastern District of Texas" with experience handling a range of patent litigation cases. Third-party business-data aggregators estimate roughly six employees and about $1.2M in annual revenue, but those figures are algorithmic estimates, not audited numbers, and should be treated as indicative only.

IP litigation specialty. The firm's practice description states it has represented clients in "hundreds of patent cases in the Eastern District of Texas," serving as both local and lead counsel for patent owners and accused infringers alike. Its public docket footprint is concentrated in wireless and mobile communications (T-Mobile, Verizon, AT&T, Ericsson, Nokia, Samsung, SK Hynix), consumer electronics and software (Dell, Adobe, Stratasys, Express Mobile, WAPP Tech), and marine electronics/sonar (Navico/Lowrance v. Garmin). The two appearances tracked in this dataset are both EDTX patent defense engagements, consistent with that profile.

Side preference. In the tracked data the firm is defense-side in 2 of 2 appearances (0 plaintiff), and the recorded roles are "Local Counsel for Defendant" and "local counsel" — i.e., an East Texas venue-and-trials partner to national trial teams rather than a case-initiating firm. That is an incomplete picture, however: the firm's own materials and public dockets show genuine two-sided work, including lead trial counsel roles for patent owners such as Navico/Lowrance. The accurate characterization is a defense-leaning local-counsel practice with a meaningful plaintiff-side trial track record.

Notable cases and outcomes. (1) Navico Inc. (Lowrance) v. Garmin — a Marshall jury found willful infringement of two sonar/down-scan imaging patents in September 2017 and returned a $39 million verdict; the firm reported it as its fourth verdict above $20 million in 36 months, with Deron Dacus as lead attorney. (2) GENBAND matters — a jury found GENBAND did not infringe and that the asserted Metaswitch patents were invalid, while Deron Dacus also served as lead trial attorney in an $8.2 million infringement verdict for GENBAND. (3) Headwater Research v. Verizon — the firm served as local counsel to Verizon in an EDTX case that produced a $175 million plaintiff's verdict in 2023 (an adverse outcome for the firm's client, reported by The Texas Lawbook). (4) The tracked matter Piney Woods Mobility LLC v. T-Mobile USA, Inc., No. 2:26-cv-00123 (E.D. Tex., filed Feb. 13, 2026, Judge Gilstrap), is an NPE campaign asserting six location-sharing/mobile-communications patents against T-Mobile; the firm appears on the defense side. Note the tracked dataset reflects only two appearances, which materially understates the firm's actual docket and likely reflects the dataset's coverage of local-counsel roles.

PTAB / IPR practice. The firm's IPR involvement appears to be coordinating rather than first-chair: Deron Dacus has been named as district-court counsel of record on PTAB papers and notices of IPR institution filed by defendant groups (including IPRs instituted against U.S. Patent Nos. 8,554,196 and 9,094,888, and service on patent-owner counsel in IPR2022-00200), with the substantive briefing led by national firms. No public report quantifies the firm's own IPR/PGR petition volume, and the firm publishes no IPR statistics; treat any characterization of an independent PTAB practice as unsupported.

Key practice leaders. Deron R. Dacus is the firm's founding trial lawyer and lead patent litigator; he is Board Certified in Civil Trial Law by the Texas Board of Legal Specialization and has been selected to Texas Super Lawyers (2009–2011, 2019–2026 per Super Lawyers' profile). Shannon M. Dacus is a trial attorney whose practice includes patent and commercial litigation and who is listed by Chambers USA as the key contact for the firm's intellectual property practice. The firm's own site reports that it was named an ALM "Go-To Law Firm" for Fortune 500 companies; that designation is firm-reported and I could not independently verify the specific year or category.