InfringementTerminologyRemedies

Patent violation: the term and what it means

By Ipiry TeamPublished August 31, 20269 min read

Short answer

Patent violation is the everyday phrase for what the law calls patent infringement. It is a civil matter, not a criminal one — nobody is prosecuted or imprisoned for infringing a patent. It means making, using, offering to sell, selling or importing something containing every element of a live patent claim, in a country where that patent is in force. Remedies are money damages and sometimes an injunction.

Patent violation is the everyday phrase for what lawyers call patent infringement. The two mean the same thing.

Infringement is the term in the statute, in court filings and in every professional document. Using it signals familiarity; using violation does not mislead anyone but marks the writer as outside the field.

And it is civil, not criminal. Nobody is prosecuted or imprisoned for infringing a patent. That confusion comes partly from the word violation and partly from the word prosecution being used for something entirely unrelated.

What the terms actually mean

Everyday term	Legal term	Where it appears
Patent violation	Patent infringement	35 U.S.C. 271
Breaking a patent	Infringing a claim	Complaints, opinions
Patent theft	Infringement	—
Stealing an idea	Nothing — ideas are not property	—
Patent prosecution	Obtaining a patent	Not criminal at all

"Patent theft" has no legal meaning. Infringement is unauthorised use of a right, not the taking of property, and nothing is removed from the owner.

"Stealing an idea" is not actionable at all unless a patent, a contract or a confidentiality obligation exists. Ideas are not property. See invention ideas.

It is not criminal

	Patent infringement	Criminal counterfeiting	Trade secret theft
Nature	Civil	Criminal	Can be criminal
Brought by	The patent holder	The government	Owner or government
Consequences	Damages, injunction	Fines, imprisonment	Fines, imprisonment
Requires intent	No, for direct infringement	Yes	Yes

Counterfeiting is a trademark matter and is criminal. Selling fake branded goods is a different offence from making a product that happens to fall within someone's patent claims.

Trade secret misappropriation can be criminal under the Economic Espionage Act. That involves taking confidential information, which is again different conduct.

Patent infringement sits outside both. A company can infringe a patent entirely by accident, having invented the same thing independently, and face only a civil claim.

Why people expect it to be criminal

Three sources of confusion, and all three are understandable.

Source	Why it misleads
The word "violation"	Suggests breaking a law rather than a civil wrong
"Patent prosecution"	Sounds criminal; means obtaining a patent
Counterfeiting is criminal	Different conduct, different statute
"Patent police" and similar phrases	No such body exists
Enforcement language in demand letters	Written to sound serious

No public authority enforces patents. There is no patent police, no regulator and no prosecutor. If a patent holder does nothing about infringement, nothing happens.

Which is a substantive point, not just a vocabulary one. Enforcement is entirely private, entirely at the holder's expense, and entirely optional.

What counts as a violation

Five acts, under 35 U.S.C. 271(a), in the US, during the term, without authorisation.

Act	Notes
Make	Including for internal use
Use	Operating it
Offer to sell	The offer alone
Sell	The transaction
Import	Bringing it into the US

Every element of a claim must be present. This is the all-elements rule and it is the single most important thing to understand.

Claim recites	Product has	Infringes?
A, B, C	A, B, C	Yes
A, B, C	A, B, C plus more	Yes — extras never help
A, B, C	A, B	No

Similarity is not the test. A product that looks nearly identical but omits one claimed element does not literally infringe. See infringe the patent.

Knowledge does not matter

Type	Knowledge required
Direct infringement	No — strict liability
Induced infringement	Yes
Contributory infringement	Yes
Willfulness (for enhanced damages)	Yes

You can infringe a patent you have never heard of, held by a company you have never heard of, having invented the thing yourself independently.

Independent invention is not a defence in US patent law. It is in copyright, and in trade secret law, which is part of why people expect it here.

Knowledge changes the exposure, not the liability. Once you know, continuing without a reasoned basis supports enhanced damages up to three times.

What the penalties are

Remedy	Basis
Reasonable royalty	Statutory floor, §284
Lost profits	Where the holder would have made the sales
Enhanced damages	Up to treble, for willfulness, discretionary
Injunction	Four-factor equitable test since eBay
Attorney fees	Exceptional cases only, §285
Pre-notice damages	Limited by marking

Damages start from actual notice if the patent holder did not mark. A holder who sells a patented product without marking it generally cannot recover for the period before they told you. See patent marking.

Injunctions no longer follow automatically. Since eBay v. MercExchange, a holder must satisfy the traditional equitable factors, and those who do not practise the invention obtain them far less readily.

Personal and small-scale use

Situation	Technically infringes	Realistically pursued
Building one for yourself	Yes	Almost never
Repairing your own patented product	Repair is permitted	—
Using a patented item you bought	No — exhaustion	—
Small-scale commercial use	Yes	Sometimes
Research with commercial purpose	Yes	Occasionally

There is no general personal use exception in US patent law, which surprises people who expect one.

The reason small-scale infringement is not pursued is economic, not legal. The damages would not justify the cost of a case.

The research exception is far narrower than assumed — the common law version covers little beyond idle curiosity. The statutory safe harbour under §271(e)(1) for FDA-related activity is much broader and far more significant in practice.

Exhaustion

Scenario	Infringes?
Bought from the patent holder, then used	No
Bought from an authorised licensee, then resold	No
Bought abroad from an authorised source, imported	No
Bought from an unauthorised maker	Yes, potentially
Made a copy of something you bought	Yes

Exhaustion attaches to the item, not the design. Buying one authorised unit gives no right to make more.

International exhaustion applies since Impression Products v. Lexmark, so an authorised sale abroad exhausts US rights in that item.

Who can bring a claim

Party	Can sue?
The patent owner	Yes
An exclusive licensee of all substantial rights	Usually yes, in their own name
A partial exclusive licensee	Usually must join the owner
A non-exclusive licensee	No
Co-owners	All generally must join
The government	No — not a criminal matter

One uncooperative co-owner can prevent enforcement entirely, because all co-owners generally must join an infringement action. See patent holder.

Verify standing when you receive a letter. The sender must own the patent or hold sufficient rights, and the assignment record is public. A letter from a party without standing can be answered on that basis alone.

Most patents cannot be violated

Ipiry Patent Survival Curve v1.0	Rate
Survive the 3.5-year fee (2022 cohort)	85.8%
Survive the 7.5-year fee (2018 cohort)	64.6%
Reach full term (2014 cohort)	41.4%
Abandoned before full term	58.6%

Computed from 27,273,654 USPTO maintenance fee records covering 8,262,336 US utility patents — see the patent survival curve.

An expired patent cannot be infringed. The invention is in the public domain and anyone may make, use and sell it freely.

Nearly three in five utility patents lapse before term, which makes checking status the fastest way to resolve most accusations.

Rights are national

Where the act happens	Infringes a US patent?
In the US	Yes
Manufactured and sold entirely abroad	No
Manufactured abroad, imported to the US	Yes
Offered for sale in the US	Yes

A US patent gives no rights in other countries. An invention patented only in the US may be freely made and sold anywhere else, which is why families are filed country by country and why most inventions are protected in one or two markets only.

What to say and not say

Do	Avoid
Acknowledge receipt	Admitting anything about the product
Ask for a claim chart	Describing your product in detail
Ask which claims are asserted	Speculating about design
Request proof of ownership	Ignoring it entirely
Take advice before substantive response	Responding the same day

Anything you say about your own product becomes evidence. A detailed explanation of how it works, sent before analysis, can supply the mapping the other side had not done.

Asking for a claim chart is always reasonable and it tests whether analysis was done at all.

If you are accused

Step	Time
1. Confirm the patent is in force	5 min
2. Verify current ownership	10 min
3. Read the independent claims	30 min
4. Compare element by element	2 hours
5. Read the prosecution history	1 hour
6. Check remaining term	10 min
7. Preliminary prior art search	2 hours

Do these before responding. They take a day, and any one of them can end the matter — an expired patent, a missing element, or an owner who no longer owns it.

Do not ignore a credible letter. Knowledge without a reasoned basis for continuing is the position enhanced damages target. See patent dispute.

Phrase	What it usually means
Patent violation	Infringement
Patent breach	Infringement, or breach of a licence
Patent infringement lawsuit	Civil litigation in federal court
Patent violation penalty	Damages — not a fine
Patent violation case	A civil case
Reporting a patent violation	Nobody to report it to

There is no authority to report infringement to. Enforcement is entirely private and entirely at the patent holder's expense.

"Breach" is worth distinguishing. Breaching a licence agreement is a contract matter; infringing a patent is a statutory one, and a former licensee who keeps using the technology can face both.

Patent violation: the checklist

Use the word infringement in any correspondence or negotiation. Violation is understood but marks you as outside the field.
Remember it is civil. Nobody is prosecuted or imprisoned for infringing a patent.
Check the patent is in force first. Nearly three in five lapse early.
Work from the claims, not the title, abstract or product description.
Apply the all-elements rule. One missing element defeats literal infringement.
Do not rely on independent invention. It is not a defence in US patent law.
Check exhaustion if the item came from an authorised source.
Confirm the acts occurred in the US, since rights are national.
Check whether the holder marked, since it limits pre-notice damages.
Get a written opinion before continuing with knowledge of a patent, because that is what enhanced damages turn on.

Common questions

What is a patent violation?

The everyday term for patent infringement — making, using, offering to sell, selling or importing something covered by a live patent claim, without authorisation. Lawyers say infringement; the two mean the same thing, and infringement is the term used in the statute and in court.

Is a patent violation a crime?

No. Patent infringement is a civil matter in the United States. Nobody is arrested, prosecuted or imprisoned for it. The remedies are money damages and, in some cases, an injunction stopping the infringing activity. Counterfeiting and trade secret theft can be criminal, but patent infringement is not.

What is the penalty for violating a patent?

Damages, at minimum a reasonable royalty under 35 U.S.C. 284, and lost profits where the patent holder can prove they would have made the sales. Damages may be trebled for willful infringement. An injunction may also be granted, though it does not follow automatically.

Can I go to jail for patent infringement?

No. It is a civil wrong, and the consequences are financial. This is different from criminal counterfeiting or criminal trade secret theft, which are separate offences involving different conduct and different statutes.

Do I violate a patent if I did not know about it?

Yes, for direct infringement. Knowledge and intent are irrelevant — it is a strict liability matter. Knowledge only becomes relevant for indirect infringement, which requires it, and for willfulness, which can multiply damages.

Is making something for personal use a patent violation?

Technically yes, since making and using are both infringing acts and there is no general personal use exception in US patent law. In practice such infringement is rarely pursued because the damages would not justify the cost.

How do I know if I am violating a patent?

Compare your product element by element against each independent claim of any patent you are concerned about. If every element of a claim is present, you infringe. Missing one element means no literal infringement, however similar the products look.

What should I do if accused of violating a patent?

Confirm the patent is in force, verify who owns it, read the claims yourself, compare element by element, and check the prosecution history. That takes a day and frequently changes the position, because demand letters routinely describe claims more broadly than they read.

Does a patent violation in one country apply everywhere?

No. Patent rights are national. A US patent covers acts in the US only, so making and selling entirely in another country does not infringe it. Importing into the US does.

How long can a patent be violated?

Only while it is in force. Once a patent expires the invention is in the public domain and anyone may use it. Nearly three in five US utility patents expire early because a maintenance fee went unpaid, so checking status is the first thing to do.

Is selling a patented product a violation if I bought it legitimately?

No, if it was sold with authorisation. Patent exhaustion means an authorised first sale exhausts the holder's rights in that item, so reselling or using it is permitted. Exhaustion does not apply if the item came from an unauthorised source.

What is the difference between patent violation and patent infringement?

Nothing substantive. Violation is the everyday word; infringement is the legal term used in 35 U.S.C. 271, in court filings and in professional practice. Using the legal term signals familiarity in any correspondence or negotiation.

What it takes to infringe a patent

What legally counts as infringing a patent — the all-elements rule, direct and indirect liability, the acts covered, the defences available, and why similarity is not the test.

Patent infringement: what counts and what happens next

What legally counts as patent infringement, how direct and indirect liability differ, what damages are available, and what to do when a demand letter arrives.

Patent dispute: resolution routes before litigation

The routes for resolving a patent dispute — design-around, negotiation, mediation, arbitration, PTAB challenge and declaratory judgment — with what each costs and when it fits.

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