U.S. District Court for the District of Maryland

I'll research this court's patent practice before writing.

U.S. District Court for the District of Maryland — Patent Litigation Profile

Court overview

The District of Maryland sits in the Fourth Circuit, with its principal courthouses in Baltimore (Northern Division) and Greenbelt (Southern Division) and an additional courtroom in Salisbury. Its bench is a generalist one — court filings from mid‑2025 name roughly fifteen district judges, active and senior. It is a small patent venue, not a destination docket: Lex Machina's 2024 report found that the Western District of Texas, District of Delaware and Eastern District of Texas together accounted for just over half of all U.S. patent filings in the 2021–23 period, and Maryland appears nowhere near that tier. Historical snapshots point the same way — one practitioner survey counted only ten patent suits filed in Maryland in the first half of 2010 (Maryland IP Law blog, citing PACER/Justia), and Justia's §271 docket for the district totals roughly 478 cases across its coverage window. This site tracks a single D. Md. case (Intellectual Ventures v. Capital One).

Docket reputation

There is no reliable basis for calling D. Md. a rocket docket or a plaintiff-friendly venue. Patent cases are not resolved on a compressed schedule here: national Lex Machina figures for non‑ANDA patent cases terminated 2022–24 put median time to claim construction at 410 days, to summary judgment at 848 days, and to trial at 1,040 days. Docket Navigator's venue comparison for the top patent courts (23–24 months to jury trial in the Western and Eastern Districts of Texas) is the benchmark D. Md. is not competing against. The most granular D. Md. data I could verify is general civil, not patent-specific: AOUSC Federal Court Management Statistics (Table C‑5, 12 months ending June 30, 2024) show a median time to disposition of 8.5 months overall, with the 854 civil cases that had court action after pretrial began running a median of 30.8 months. I found no published D. Md. patent transfer grant rate or judge-level win-rate analysis; nationwide, Berkeley Technology Law Journal's 2019 study found §1404(a)/§1406 success rates rose to roughly 70% post‑TC Heartland, but that is not district-specific. One notable procedural feature: the tracked case was referred to a special master under Rule 53 for claim construction recommendations, and the district court reviewed those de novo — a tool some D. Md. judges use in complex patent cases.

Local rules and procedures

Maryland is one of roughly 31 districts with district-wide patent local rules (FJC, Patent Case Management Judicial Guide, App. D), codified at L.R. 801–807 in the court's Local Rules compilation (current version dated July 1, 2023):

• L.R. 802 makes the rule deadlines presumptively modifiable — by party agreement, or for complex technologies, many patents, foreign parties, or translation-heavy evidence. A Maryland Journal of Business & Technology Law analysis described this as a middle ground between the rigid E.D. Tex./N.D. Cal. models and purely judge-set schedules.
• L.R. 804.1 sets infringement contentions at 30 days and invalidity contentions at 60 days from the scheduling order, with amendment only by stipulation or good cause. The district has enforced this — D. Md. decisions have excluded invalidity theories raised after the contention deadline (see the Changzhou line of authority cited in later D. Md. opinions, 112 F. Supp. 3d 333).
• L.R. 805 governs claim construction: staggered (now proposed to be simultaneous) proposed/responsive statements, a Joint Claim Construction Statement at 120 days, opening briefs at 120 days, responsive briefs at 150 days, and a Markman hearing; extrinsic evidence including expert testimony is expressly contemplated. Judges have issued letter orders construing the rule's "special or uncommon meanings" language (e.g., Durr v. EFC, No. 1:18-cv-02597 (D. Md.)).
• L.R. 806 requires signed certifications; L.R. 807 gates motions to stay pending reexamination on production of the reexamination order and first office action.
• The court published proposed 2025 amendments: consolidating L.R. 805.1–.3 into one claim-construction track, requiring simultaneous initial disclosures of proposed constructions, expressly allowing reply briefs, and repealing L.R. 807. I could not verify from the sources reviewed whether those amendments have been adopted.

I found no judge-specific patent standing order in D. Md. comparable to the Western District of Texas's Order Governing Proceedings; the district-wide rules are the primary source of predictability.

Notable cases

The tracked case is the district's flagship patent matter: Intellectual Ventures I LLC v. Capital One Financial Corp., No. 8:14-cv-00111 (D. Md.), assigned to Judge Paul W. Grimm. Judge Grimm rejected his special master's recommendation and granted summary judgment invalidating the '081 and '002 patents under §101 (Sept. 2, 2015), applying Alice and the Federal Circuit's earlier ruling between the same parties, 792 F.3d 1363 (Fed. Cir. 2015), from parallel E.D. Va. litigation; he also invalidated the '084 and '409 patents on issue-preclusion grounds (later withdrawn on appeal). The Federal Circuit affirmed on March 7, 2017 (Appeal No. 2016‑1077), and also sustained the district court's Rule 54(b) certification. Judge Grimm's November 30, 2017 opinion then granted IV summary judgment on Capital One's Sherman Act §2 and Clayton Act §7 counterclaims — the "Dovregubben" opinion — holding IV's suits were not objectively baseless under Noerr-Pennington and that collateral estoppel barred the alleged "cluster market." That ruling is a frequently cited data point on antitrust claims against NPEs; post-judgment cost proceedings continued into 2023. The broader docket skews toward regional life-sciences, defense-technology and mid-size NPE matters — e.g., Merck Sharp & Dohme LLC v. Johns Hopkins University (2022), Lonza Walkersville v. Miltenyi Biotec North America (2022), G.W. Aru/Cochise Technology v. W.R. Grace (2022), and BTL Industries v. Tekyard — with no high-volume filing concentration.

Judges

No D. Md. judge appears in Lex Machina's national busiest-patent-judge rankings (the 2024 report names Rodney Gilstrap and Alan Albright at the top), and I found no reliable per-judge patent caseload data for this district, so I will not rank judges or characterize them as plaintiff- or defendant-friendly. What is sourced: Judge Paul W. Grimm authored every substantive opinion in the tracked case (the §101 and NPE-antitrust rulings); Judge Deborah L. Boardman handled that case's 2023 post-judgment cost rulings; and Chief Judge George L. Russell III is the district's chief judge (named as such in 2025 court filings). Other judges on the current bench — including Theodore D. Chuang, Paula Xinis, Stephanie A. Gallagher, Julie R. Rubin, Brendan A. Hurson, Adam B. Abelson, Lydia Kay Griggsby and Matthew J. Maddox, plus senior judges Richard D. Bennett, James K. Bredar, Deborah K. Chasanow and Ellen L. Hollander — draw patent cases by random assignment. The practical takeaway: expect a generalist judge, and rely on L.R. 801–807 rather than a specialized patent bench for scheduling predictability.

Sourcing caveat: district-specific patent filings-per-year, transfer grant rates, and patent time-to-trial figures for D. Md. are not published in the sources I could verify; the statistics above are national or all-civil and are labeled as such.