Federal district courts throughout the country have enacted “patent local rules” that streamline how patent cases are litigated. Here we provide a brief description of what they are, how they are applied, and some reasons why you need to know them intimately.
Q1. What are patent local rules?
Patent local rules (“PLRs”) are specialized procedural rules for patent infringement cases. For example, the United States District Court for the Northern District of California instructs that its PLRs “apply to all civil actions filed in or transferred to this Court which allege infringement of a utility patent in a complaint, counterclaim, cross-claim or third party claim, or which seek a declaratory judgment that a utility patent is not infringed, is invalid or is unenforceable.” N.D. Cal, Patent L.R. 1-2. PLRs will often also apply to design patent cases. Patent local rules supplement and may sometimes modify the Federal Rules of Civil Procedure and/or the civil local rules of a district court. They also often codify case law requirements for patent cases, e.g., establishing claim construction timing and procedures. The Federal Circuit has consistently upheld PLRs as a proper exercise of the trial court’s case-management discretion, characterizing the rules as “seek[ing] to balance the right to develop new information in discovery with the need for certainty as to the legal theories.” See O2 Micro Int’l Ltd. v. Monolithic Power Sys., Inc., 467 F.3d 1355, 1366 (Fed. Cir. 2006).
Q2. How do districts and/or courts implement PLRs?
Like civil local rules, districts can implement PLRs on a district-wide basis. For example, the Northern District of California was the first district to adopt PLRs in 2000, and N.D. Cal. courts use those PLRs throughout that district. Some judges also adopt their own chambers rules or implement standing orders that modify their district’s PLRs. Generally, the schedule set forth in the PLRs (as modified by the court or the parties’ agreement, if applicable) becomes part of the scheduling order in a patent infringement case. Parties litigating in districts or in front of judges without PLRs may want to consider stipulating to the use of PLRs from another district in an effort to streamline litigation.
Q3. What do PLRs generally include?
The Federal Circuit describes PLRs as “essentially a series of case management orders.” See O2 Micro Int’l Ltd., 467 F.3d at 1363. PLRs generally include deadlines and requirements relating to patent disclosures and claim construction proceedings—events unique to patent litigation that may be case-dispositive. Examples of PLRs include setting deadlines for the disclosure of asserted claims and accused products, the early exchange of the parties’ infringement and non-infringement contentions, invalidity and response to invalidity contentions, and damages contentions. Other rules set presumptive limits on the number of claim terms to be construed and set deadlines for opening, responsive, and reply claim construction briefs. Failure to follow these rules can cause an untimely disclosure of an infringement theory or defense to be dismissed/excluded from the case.
Q4. Why would I want PLRs?
First, PLRs tend to make the timing of patent cases more predictable, which generally improves overall management of cases for the court and the litigants. Second, discovering an opponent’s theory of liability or defenses may be difficult to achieve through traditional discovery mechanisms, like contention interrogatories. And even if achievable, parties may solidify infringement and/or invalidity theories late in litigation when further discovery is unavailable, effectively prejudicing the propounding party. PLRs are designed to foreclose on an opponent’s delay in disclosure or amendment to its theories, and expedite resolution of disputes related to those disclosures. By both parties understanding the metes and bounds of the claims and defenses, it focuses discovery, claim construction disputes, and—ideally—helps expedite a less costly resolution of the case.
Q5. Which jurisdictions that hear the most patent cases have PLRs?
The table below shows the jurisdictions that preside over the most patent cases in the United States, along with whether some form of PLRs are available in the jurisdiction. As you can see, only two jurisdictions do not have district-wide PLRs.
 Delaware’s Default Standard for Discovery requires infringement and validity contentions along with specialized document production on par with more formal PLRs.
 Although the Central District of California has not yet adopted formalized PLRs, Judges Guilford, Staton, and Wright do have standing orders with PLRs for patent cases.
 The Western District of Texas is emerging as one of the leading jurisdictions for patent cases filed in 2020, and its caseload is on par with the District of Delaware. For example, between January 1 and April 27, 2020, the following jurisdictions have seen the most patent cases filed: D. Del. (232), W.D. Tex. (225), E.D. Tex. (120), C.D. Cal. (108), D.N.J. (72), N.D. Ill. (69), N.D. Cal. (65), and S.D.N.Y. (27). (Source: Lex Machina)
 Judge Albright in the Waco Division has a standing order governing proceedings in patent cases that do require the core PLR disclosures.
The opinions expressed are those of the authors on the date noted above and do not necessarily reflect the views of Fish & Richardson P.C., any other of its lawyers, its clients, or any of its or their respective affiliates. This post is for general information purposes only and is not intended to be and should not be taken as legal advice. No attorney-client relationship is formed.
Jason W. Wolff is a principal in the Southern California office of Fish & Richardson P.C. A member of the firm’s litigation group, Mr. Wolff’s practice emphasizes intellectual property litigation and dispute resolution in areas involving electrical engineering and computer science. He previously worked in the patent group at Oracle Corp....
Kayleigh McGlynn is a litigation associate in the Boston office of Fish & Richardson P.C. Kayleigh was previously a summer associate at Fish.
During law school, Kayleigh served as the electronic supplement editor for the Boston College Law Review and editor-in-chief of the Boston College Intellectual Property &...
Madelyn McCormick is an associate in the Southern California office of Fish & Richardson P.C. Ms. McCormick was previously a summer associate with Fish. Prior to joining Fish, Ms. McCormick served as a judicial intern to the Honorable Marianne B. Bowler, magistrate judge, of the U.S. District Court for the District of Massachusetts.
Megan Chacon is a principal in the Southern California office of Fish & Richardson P.C. Her practice emphasizes complex patent litigation across a wide range of technologies. Ms. Chacon has extensive experience in the life sciences and pharmaceutical fields, including Hatch-Waxman litigation. She has worked on matters involving a wide...
Michael A. Amon is the vice office managing principal of the Southern California office of Fish & Richardson P.C. His practice emphasizes intellectual property litigation, including patent infringement and business litigation. Mr. Amon previously clerked for the Honorable James F....
Ricardo Bonilla is a litigation attorney focusing his practice across all areas of commercial and intellectual property litigation, with an emphasis on patents. Mr. Bonilla currently serves as the firm’s recruiting principal in Dallas and co-chair of Lawtinos, the firm’s Hispanic/Latinx legal staff affinity group. Mr. Bonilla is also...