Virtual Patent Marking

Virtual marking is the URL-based alternative to physically stamping patent numbers on products: BACKGROUND — TRADITIONAL PHYSICAL MARKING: before 2011, 35 U.S.C. § 287(a) required patent owners to physically mark products with the applicable patent numbers (or the word 'patent') to recover damages from the date of infringement rather than just from the date of actual notice; for products with multiple patents, or for products where patents issue and expire over time, maintaining accurate physical markings was expensive and impractical; VIRTUAL MARKING — AIA AMENDMENT (2011): the AIA added a sentence to § 287(a): 'Filing may also be provided by fixing thereon the word 'patent' or the abbreviation 'pat.' together with an address of a posting on the Internet, accessible to the public without charge for accessing the address, that associates the patented article with the number of the patent'; WHAT VIRTUAL MARKING ALLOWS: a product can be marked with: 'Patent: [URL]' or 'Pat.: [URL]' where [URL] is a freely accessible webpage that lists the patent numbers applicable to the product; LEGAL EFFECT: virtual marking has the same legal effect as physical marking under § 287; once a product is properly virtually marked, constructive notice to the public exists; damages can be recovered from the date of infringement (up to 6-year statute of limitations looking backward) rather than only from the date of actual notice to the infringer; WHY VIRTUAL MARKING IS NOW PREFERRED: EASY TO UPDATE: when a new patent issues, add it to the website immediately; when a patent expires, remove it; no need to redesign packaging or retool manufacturing molds; WORKS FOR SOFTWARE: software products and digital goods that cannot be physically stamped can use virtual marking via the product UI; the 'About' page or footer can contain 'Patent: [URL]'; LARGE PORTFOLIOS: companies with hundreds of patents covering a product can list all of them on a single webpage rather than trying to engrave every patent number on the product; INTERNATIONAL PRODUCTS: US virtual marking only satisfies US § 287; foreign marking requirements are separate.

A virtual marking webpage must meet specific requirements to satisfy § 287: REQUIREMENT 1 — FREELY ACCESSIBLE: the URL must be 'accessible to the public without charge for accessing the address'; this means: NO paywall; NO subscription; NO login or registration requirement; NO CAPTCHA that prevents access; the page must load publicly for anyone who accesses it; REQUIREMENT 2 — THE URL MUST BE ON THE PRODUCT: the marking must be placed ON THE PRODUCT (or its packaging): 'Pat.: [URL]' or 'Patent: [URL]'; for a physical product: on the product itself or on packaging that accompanies each product; for software: in the product UI (Help > About; or in the footer; or during installation); for websites/apps: in the footer or an accessible 'IP Notice' page accessible from the product; REQUIREMENT 3 — URL MUST ASSOCIATE THE PATENT WITH THE ARTICLE: the webpage must make clear WHICH patents cover WHICH products; if a company sells 10 different products, the marking page should indicate which patent numbers cover each product; a single unformatted list of all patents is insufficient if it does not clearly associate each patent with the article it covers; IN PRACTICE: create a table: Product Name | Patent Number(s); or separate sections per product; REQUIREMENT 4 — CONTINUOUSLY MAINTAINED: the page must be updated as the portfolio changes; ADD NEW PATENTS PROMPTLY: when a new patent issues, add it to the marking page immediately; the period from the patent issue date until it is added to the marking page may affect when damages accrue; REMOVE EXPIRED PATENTS: once a patent expires, remove it from the page; listing an expired patent as if it is active is potentially false marking; ARCHIVAL: consider keeping a dated history of when patents were added/removed; this evidence can be critical in damages disputes; REQUIREMENT 5 — DURABLE URL: choose a stable URL that will not change; if the URL changes, update all marked products; a broken or changed URL defeats the marking; example URL: 'https://example.com/patents' or 'https://example.com/legal/patent-notice'.

The relationship between virtual marking and damages accrual is the core strategic importance of marking compliance: THE GENERAL RULE — § 287(a): WITHOUT MARKING: the patent owner can only recover damages for infringement occurring AFTER the infringer received ACTUAL NOTICE of infringement; actual notice = demand letter; lawsuit filing; personal communication identifying the specific patent and accused product; WITH MARKING (physical or virtual): the patent owner can recover damages from the date the infringement BEGAN (subject to the 6-year statute of limitations lookback period under § 286); marking creates CONSTRUCTIVE NOTICE — the infringer is deemed to have known of the patent even if they were not specifically told; EXAMPLE OF IMPACT: Patent issues January 2022; Product launched by infringer March 2022; Patent owner sends demand letter January 2025; Patent owner files suit March 2025; WITHOUT MARKING: damages begin January 2025 (date of actual notice) — the infringer escapes 3 years of damages; WITH MARKING: damages begin March 2022 (date of infringement) — subject to 6-year lookback from filing date; difference could be millions of dollars; VIRTUAL MARKING COMPLIANCE GAP: if the patent issued January 2022 but the virtual marking page was not updated until June 2022, damages might be argued to accrue only from June 2022 (when the virtual marking was established) — not January 2022; UPDATE MARKING PAGES IMMEDIATELY ON ISSUANCE: the patent prosecution docketing system should have a workflow: patent issues → immediately add to virtual marking page → document the date of addition; DOES THE INFRINGER ACTUALLY NEED TO VISIT THE MARKING PAGE?: no — the marking gives CONSTRUCTIVE notice; the infringer is deemed to have known even if they never visited the URL; the burden of proof is on the INFRINGER to prove lack of constructive notice (which is very difficult once the marking is established); DOES VIRTUAL MARKING APPLY TO METHOD CLAIMS?: § 287(a) applies only to PRODUCT claims; method claims do NOT require marking; a patentee with only method claims does NOT need to mark; if a patent has BOTH product and method claims, the marking requirement applies to the product claims even if the patentee only wants to enforce the method claims.

False marking is a serious compliance risk, especially as patents expire: WHAT IS FALSE MARKING — 35 U.S.C. § 292: false marking is marking a product with a patent number when the product is NOT covered by that patent; two categories: (1) MARKING AN INAPPLICABLE PATENT: marking a product 'Patent X' when patent X does not cover the product; (2) MARKING AN EXPIRED PATENT: marking a product with a patent number after that patent has expired (if done with intent to deceive); THE PENALTY: $500 per offense (per marked article); who can sue: post-AIA (2011), only the US government or a competitor who has suffered competitive injury can bring a false marking suit; pre-AIA, any person could sue (qui tam); AIA eliminated qui tam false marking suits but retained government and competitive injury claims; VIRTUAL MARKING AND EXPIRATION: a CRITICAL risk with virtual marking is FAILING TO REMOVE EXPIRED PATENTS from the marking page; if a patent expires and the marking page still lists it, this could constitute false marking IF the marking was done with intent to deceive the public; BEST PRACTICE — EXPIRATION TRACKING: maintain a docketing system that flags patents approaching expiration (e.g., 6 months before) so the marking page can be updated; remove expired patents ON or BEFORE their expiration date; VIRTUAL MARKING AND CONTINUATIONS: when a patent in a family expires but a continuation covering the product is still live, the continuation's number should be on the marking page; be precise about WHICH patents are live and cover WHICH products at any given time; MARKING WITH APPLIED-FOR PATENTS: a product can be marked 'Patent Applied For' or 'Patent Pending' to indicate an application is filed; this has no legal effect on damages (there are no patent rights yet) but deters copying; once the patent issues, the marking must be updated to include the patent number; CHECKING YOUR COMPETITOR'S MARKING: if you are a potential infringer, check your competitor's marking page: expired patents listed = potential false marking claim; improper scope (patents that don't actually cover the product) = potential false marking claim; also check whether products are marked at all — failure to mark = you only owe damages from actual notice.

Software and digital products have unique virtual marking challenges and opportunities: THE CHALLENGE WITH PHYSICAL MARKING FOR SOFTWARE: software cannot be physically stamped; packaging has limited space and is often not included with digital downloads; UPDATE FREQUENCY: software patents frequently change (new patents issue; old ones expire); updating physical packaging is slow and expensive; VIRTUAL MARKING SOLUTIONS FOR SOFTWARE: IN-PRODUCT UI: the most defensible approach is in-product marking visible to users; common placements: Help menu → 'About [Product]' dialog; Settings → Legal Notices; product footer (for web applications); installation screens; login page footer; 'About' section in mobile apps; EXAMPLE: in the app's About dialog: 'Patent: https://company.com/patents'; WEBSITE PRODUCTS AND SAAS: for web-based products, include the marking in the product's footer or a legal notices page: 'This product may be covered by patents listed at https://company.com/patents'; DOWNLOADS AND DOCUMENTATION: for downloaded software, include marking in the README; installation documentation; or end-user license agreement (EULA); API AND SDK PRODUCTS: for APIs and SDKs used by developers, include marking in the developer documentation and in the API's response headers or SDK readme; PATENT MARKING PAGE BEST PRACTICES FOR SOFTWARE COMPANIES: PRODUCT-SPECIFIC SECTIONS: organize by product name or product family; PATENT TABLE: columns for Patent Number; Issue Date; Expiration Date; Countries Covered; CLEAR LANGUAGE: 'The following patents apply to [Product Name]'; DATE STAMPS: include 'Last Updated: [Date]' on the marking page; CHANGELOG: optionally maintain a history log of when patents were added/removed; INTERNATIONAL CONSIDERATIONS: US virtual marking only satisfies US § 287; other countries have their own marking rules; EU: there is no equivalent mandatory marking requirement (marking is optional; damages available from the date of infringement regardless); China: recommended but not legally required for damages; Japan: no marking requirement; MOBILE APPS: app stores (Apple App Store; Google Play) are a useful place to include IP notices; the 'Privacy Policy' or 'Legal' link in the app listing can link to the patent marking page; HOW TO STRUCTURE THE PAGE: keep it simple but specific; a table with product name; applicable US patent numbers; and brief description of what each covers is ideal; avoid legalese that obscures the connection between product and patent.