Patent Enforcement Strategy

Patent enforcement requires careful timing and risk assessment: THRESHOLD QUESTION — IS ENFORCEMENT WORTH IT?: (1) Is the patent likely valid? (prior art searches; prosecution history problems; Alice/Mayo risk; Wands enablement risk); (2) Is the defendant actually infringing? (claim charts completed by qualified patent counsel); (3) Is the defendant's product commercially significant enough to justify enforcement costs? (damages potential must exceed litigation cost); (4) Can the defendant pay? (assess defendant's financial health); (5) Does enforcement align with business strategy? (would creating an adversary here harm other business relationships?); TIMING FACTORS: STATUTE OF LIMITATIONS: 35 U.S.C. § 286: patent owner can only recover damages for infringement occurring in the 6 years before suit is filed; filing sooner = more damages recoverable; laches defense (pre-SCA Hygiene, 2017) mostly eliminated by the Supreme Court but equitable principles may still apply; BEFORE FILING — STRATEGIC CONSIDERATIONS: MARKING: has the patent owner marked its products? (§ 287 marking); unmarked products → damages only from date of actual notice (the lawsuit or an earlier C&D letter); virtual marking (patent.com URL on product) satisfies § 287; HALO WILLFULNESS: if the defendant was aware of the patent and its potential infringement before the lawsuit, enhanced damages (up to 3×) may be available; document awareness (emails, prior licensing conversations, citations to the patent); INVESTIGATION COMPLETENESS: have you confirmed infringement of at least one independent claim?; is the defendant in a jurisdiction where venue is proper?; have you assessed IPR/PGR vulnerability of your claims? (defendant will challenge via IPR); ENFORCEMENT DECISION TREE: (1) strong patent + clear infringement + significant product → full enforcement (licensing demand → litigation if no response); (2) strong patent + clear infringement + small product → licensing demand only; (3) uncertain patent + infringement risk → IPR/prior art study first, then decide; (4) weak patent + questionable infringement → do not enforce (sanctions risk; inequitable conduct claims).

Claim charts are the foundational document for any patent enforcement effort: DEFINITION: a claim chart is a two-column table that maps each element of a patent claim to corresponding evidence of infringement in the accused product or process; STRUCTURE: COLUMN 1: the specific claim language, broken into individual elements; COLUMN 2: citations to evidence that each element is present in the accused product (product documentation; teardowns; source code (if obtained); website descriptions; patent filings; academic papers by the defendant; reverse engineering reports); USES OF CLAIM CHARTS: PRE-SUIT INVESTIGATION: confirm infringement before filing or sending a demand letter; required before filing to satisfy Rule 11 (attorney's certification that the filing has factual support); LICENSING DEMAND: included in initial licensing letters to show the defendant WHY the patent applies; dramatically improves licensing negotiation effectiveness compared to bare assertion; INFRINGEMENT CONTENTIONS: in federal litigation, Local Patent Rules (most districts) require plaintiffs to serve detailed infringement contentions early in the case (often 14-45 days after the scheduling conference); contention charts must be updated as discovery proceeds; CLAIM CONSTRUCTION SUPPORT: during Markman hearings, claim charts help the court understand how the plaintiff construes the claim language; TRIAL EXHIBITS: presented to the jury; must be understandable by non-technical jurors; QUALITY REQUIREMENTS: every element of the claim must be mapped; claims cannot be partially mapped (must show ALL elements present for literal infringement, or equivalent substitutes for DOE); must cite SPECIFIC evidence (page numbers, section numbers, screenshots with annotations); PRIVILEGE: pre-suit claim charts prepared by or at the direction of counsel are work product; be careful about internal technical team preparation without attorney oversight — may not be privileged; BOTH SIDES USE CHARTS: plaintiff's claim charts show infringement; defendant's invalidity charts compare claim elements to prior art.

The ITC (International Trade Commission) is a powerful but specialized enforcement forum: LEGAL BASIS: Section 337 of the Tariff Act of 1930 (19 U.S.C. § 1337); JURISDICTION: covers unfair practices in import trade, including infringement of US patents, trademarks, copyrights; the ITC can investigate any imported product; ITC PROCESS: COMPLAINT: filed with the ITC; must name specific imported products; typically also names the foreign manufacturer AND domestic importer/reseller; ITC staff (Office of Unfair Import Investigations) participates as a third party; INSTITUTION: ITC decides whether to investigate; ~80-90% of complaints result in an investigation being instituted; TIMELINE: one of the fastest proceedings in IP: 12-16 months from institution to initial determination; ADMINISTRATIVE LAW JUDGE (ALJ): one ALJ handles the investigation; full trial (evidentiary hearing) within 8-12 months; ALJ issues initial determination; COMMISSION REVIEW: full Commission can review ALJ's determination; final determination typically within 4 months of ALJ; REMEDIES: EXCLUSION ORDER: the most powerful remedy — US Customs blocks importation of the infringing products; limited exclusion order (specific company); general exclusion order (all importers of infringing products); CEASE AND DESIST ORDER: against domestic companies holding inventory; when to use ITC: manufacturer is foreign and most sales are imported products; the patent owner wants fast resolution (12-16 months vs. 3-5 years in district court); the patent owner wants a powerful remedy (customs exclusion is more immediate than a damages judgment); the product has a short market life (important in consumer electronics); coordinate with parallel district court litigation: file ITC + district court simultaneously; ITC often leads to early settlement when defendant realizes it may lose import rights; district court can continue for damages if ITC issues exclusion order.

Patent venue rules changed dramatically after TC Heartland: PRE-TC HEARTLAND: before 2017, patent owners could file in virtually any federal district court where the defendant sold products; plaintiffs frequently chose the Eastern District of Texas (Marshall division): plaintiff-friendly local rules; fast docket; juries receptive to patent owners; TC HEARTLAND LLC v. KRAFT FOODS GROUP BRANDS LLC (S.Ct. 2017): narrowed patent venue (28 U.S.C. § 1400(b)); a defendant corporation may only be sued for patent infringement in: (a) the district where the defendant is incorporated; OR (b) the district where the defendant has committed acts of infringement AND has a regular and established place of business; 'REGULAR AND ESTABLISHED PLACE OF BUSINESS' STANDARD: In re Cray Inc. (Fed. Cir. 2017): (1) there must be a physical place of business; (2) the place must be regular and established; (3) the place must be defendant's place (not just an employee's home office); IMPACT: Eastern District of Texas went from ~40% of all patent cases to ~15%; Delaware became primary venue (where most large corporations are incorporated); Western District of Texas (Waco division — Judge Albright) rose to prominence 2019-2022; TOP CURRENT PATENT VENUES: District of Delaware: most corporations incorporated here; large patent docket; experienced judges; predictable outcomes; Western District of Texas: fast; plaintiff-friendly (historically); California (Northern + Central): tech companies headquartered there; local rules not always plaintiff-friendly; Eastern District of Texas: still significant for companies with Texas nexus; ITC: always an option for imported products regardless of TC Heartland (ITC is not a federal district court); FORUM SHOPPING STRATEGIES: review where defendant has offices; review defendant state of incorporation; consider 'regular and established place of business' evidence (satellite offices; employees with designated home offices; sales force in territory); consider ITC as alternative forum if venue is problematic.

Most patent enforcement actions resolve before trial through settlement or license: SETTLEMENT STATISTICS: approximately 95-97% of patent cases file, settle, or are dismissed before trial; those that reach trial involve 1-3 years of litigation and $3M-$10M+ in legal fees per side; SETTLEMENT TIMING DRIVERS: settlements occur at predictable inflection points: EARLY (pre-institution or shortly after): IPR petition filed → defendant sees claim vulnerability; claim charts presented at licensing meeting → infringement is clear; pre-filing discussions (licensing offer accepted before lawsuit); POST-MARKMAN (claim construction): if claims construed narrowly, plaintiff may reduce demand or dismiss; if claims construed broadly, defendant settlement motivation increases; BEFORE TRIAL: trial preparation reveals weaknesses in both sides' cases; litigation cost burden; senior management attention required for trial; POST-IPR (after PTAB institution): if IPR instituted, defendant likely requests stay of district court; if claims canceled in IPR, case is over; if claims confirmed, settlement leverage shifts to patent owner; ECONOMIC SETTLEMENT DRIVERS: DEFENDANT'S PERSPECTIVE: litigation cost vs. license cost; management distraction; product delay risk (injunction); reputational risk; supply chain disruption (ITC exclusion order); PLAINTIFF'S PERSPECTIVE: certainty of recovery vs. risk of invalidity finding; time value of money; IPR risk (claims could be canceled); resource cost of litigation; WHAT GOES INTO SETTLEMENT: LUMP SUM or RUNNING ROYALTY LICENSE: one-time payment for past + future use; or ongoing royalty on covered products; CROSS-LICENSE: if defendant also has patents covering plaintiff's products; COVENANT NOT TO SUE: agreement not to assert the patents against the defendant going forward; DISMISSAL WITH PREJUDICE: court case dismissed; ENFORCEMENT COUNSEL: most enforcement is done by contingency-fee plaintiff's firms or at hourly rate by boutique patent litigation firms.