Patent Marking & Compliance
Patent False Marking
§ 292 penalties, virtual marking, and why the AIA killed false-marking class actions.
Quick Answer
Marking a product with an expired, inapplicable, or fictitious patent number with intent to deceive violates 35 U.S.C. § 292. The AIA (2011) eliminated the pre-AIA qui tam tsunami — private suits now require actual competitive injury. Virtual marking (a website URL listing patent numbers) is now the preferred compliance approach.
The Statute
35 U.S.C. § 292 — False Marking
§ 292 has two prohibitions and two remedies:
Prohibition 1: False patent marking
Marking any article with a patent number with INTENT TO DECEIVE THE PUBLIC when the patent has expired, never covered the article, or does not exist. Includes marking packaging, advertising, or product itself.
Prohibition 2: False 'patent pending'
Marking any article or using the words 'patent' or 'patent pending' to deceive the public when no application is actually pending. Using 'patent pending' after application abandonment is a common violation.
Pre-AIA Remedy (historical)
$500 per article — split with the United States. ANY person could sue as a qui tam relator. Led to class-action suits (billions of articles × $500) that firms like Parker Hannifin faced for marking plastic tools with expired patents.
Post-AIA Remedy (current)
Only the UNITED STATES can recover the $500/article penalty. PRIVATE parties can sue only for actual competitive injury suffered. Result: private false-marking litigation effectively eliminated unless plaintiff is a direct competitor with documented harm.
Virtual Marking
35 U.S.C. § 287(a) — Virtual Marking via URL
The AIA added virtual marking to § 287(a). Instead of physically stamping every product with patent numbers, a manufacturer can:
Mark the product with: 'Patent: [URL]' or 'Patented: [URL]'
The URL must be freely accessible to the public without charge
The linked page must list all patent numbers that cover the product
The page should be updated as new patents issue or old ones expire
No requirement to re-tool molds or reprint labels when patent status changes
Virtual marking solves the classic problem: a manufacturer who uses the same mold for 10 years cannot cost-effectively update the physical marking every time a patent expires or a new one issues. With virtual marking, the URL stays constant but the webpage can be maintained in real-time. Amazon, Apple, Tesla, and most major manufacturers have adopted virtual marking pages.
FAQ
What is patent false marking?
Patent false marking occurs when someone marks an article with a patent number with the intent to deceive the public, when: (1) the patent has expired; (2) the patent never covered that article; or (3) the number is fictitious. 35 U.S.C. § 292 also makes it illegal to use the words 'patent' or 'patent pending' falsely. The statute applies to marking on products, packaging, advertising, or other materials asserting patent protection that doesn't exist.
Who can sue for patent false marking after the AIA?
The America Invents Act (AIA) of 2011 significantly restricted standing. Pre-AIA, any person could sue as a qui tam relator and collect up to $500 per article, split with the government — this led to a wave of class-action false marking suits for products marked with expired patents. Post-AIA, only the United States can collect the $500/article penalty. A private party (competitor or person who has suffered competitive injury) can sue only for actual damages suffered — not the per-article statutory penalty. This change eliminated virtually all private false marking suits by non-competitors.
What is virtual marking and how does it satisfy patent marking requirements?
35 U.S.C. § 287(a) was amended by the AIA (effective September 16, 2011) to allow 'virtual marking' — instead of physically stamping a patent number on every product, the patent owner can mark the product with a URL that links to a page listing the patents covering the product. The URL must be freely accessible to the public and the page must list the relevant patent numbers. Virtual marking solves the problem of updating marking when new patents issue or old ones expire without requiring new molds, labels, or manufacturing runs.
What are the penalties for false marking?
Under current § 292 (post-AIA): the United States can recover $500 per article marked falsely with intent to deceive — with that amount split between the U.S. and the relator if the suit is brought as a qui tam action. A private competitor who suffers competitive injury can recover only the actual damages suffered. There is no criminal penalty, but false marking could contribute to inequitable conduct or common law fraud claims in appropriate circumstances. Courts assess whether the false marking was 'with intent to deceive' — simple negligence or mistake is not sufficient.
Is marking with an expired patent number always false marking?
Yes, if done with intent to deceive. But note: under § 292, the government or a private party must prove the intent to deceive. Merely failing to remove an expired patent number from packaging that was already manufactured before expiration may not constitute 'intent to deceive' depending on the facts. Companies should audit their product marking periodically and update as patents expire — virtual marking makes this easier since the URL remains constant but the linked page can be updated.
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