Founding Partner
When a court finds patent infringement, the patent holder is entitled to damages adequate to compensate for the infringement, but calculating those damages is rarely straightforward. Courts use specific legal frameworks to assess what you are owed, and the difference between the right damages theory and the wrong one can be worth millions.
If someone has been using your patented technology without permission, winning the infringement case is only half the battle. The other half is proving what that infringement actually cost you and satisfying the legal standards courts apply to patent damages.
Richard Gearhart, founding partner of Gearhart Law, has spent nearly 30 years representing businesses in patent matters across New Jersey and beyond. Our team put together this guide to help business owners understand how patent infringement damages are assessed and what that means for recovery.
The Legal Standard for Claiming Damages
Patent damages are governed by 35 U.S.C. § 284, which requires the court to award damages adequate to compensate for the infringement but no less than a reasonable royalty, together with interest and costs. Courts have interpreted this to support two main damages frameworks:
- Lost profits: What the patent holder would have earned but for the infringement
- Reasonable royalty: The minimum the infringer should have paid for a license
Depending on the facts of the case, a patent holder may be able to seek lost profits, a reasonable royalty, or both. Lost profits cover the specific sales they lost because of the infringement. Reasonable royalty covers any remaining infringing sales where specific lost sales cannot be proven.
Lost Profits: Proving What the Infringement Actually Cost You
Lost profits is the more valuable damages theory when it is available. Instead of asking what a reasonable license would have cost, it asks what sales the patent holder actually lost because of the infringement. In high-volume markets, that difference can be enormous.
The Panduit Test
Courts apply the four-factor Panduit test to determine whether a patent holder can recover lost profits. To qualify, the patent holder must prove:
- Demand for the patented product: There was actual market demand for the product embodying the patent
- Absence of acceptable non-infringing substitutes: The infringer could not have simply directed customers to a non-infringing alternative that would have captured the same sales
- Manufacturing and marketing capacity: The patent holder had the ability to meet the demand the infringer captured
- The amount of profit the patent holder would have made: A specific, documented calculation of what those sales would have generated
One of the more challenging factors to establish can be the absence of an acceptable non-infringing substitute. If the infringer can point to another product that customers would have bought instead, your lost profits claim weakens significantly.
This is where economic experts come in. They build a picture of what the market would have looked like without the infringement, showing which sales you would have made if the infringing product had never existed.
The Entire Market Value Rule
In cases where the patented feature is only one component of a larger product, the patent holder generally cannot claim lost profits on the entire product unless the patented feature drives customer demand for the whole product. This is called the entire market value rule.
For technology and AI companies especially, this matters. If your patent covers a specific feature in a product with dozens of features, the damages calculation is limited to the value attributable to the patented feature, not the total product revenue, unless you can show that the patented feature is the primary basis for customer purchases.
Reasonable Royalty: The Damages Floor
Even when lost profits cannot be established, a patent holder may recover a reasonable royalty as the statutory damages floor. Courts determine the reasonable royalty by asking what the patent holder and the infringer would have agreed to in a hypothetical negotiation conducted at the moment infringement began.
The Georgia-Pacific Factors
Courts apply up to 15 factors known as the Georgia-Pacific factors to determine what that hypothetical negotiation would have produced. The most significant include:
- The royalties the patent holder receives for licensing the patent to others
- The rates paid by the licensee for the use of comparable patents
- The nature and scope of the license (exclusive or non-exclusive, limited or broad)
- The established profitability of the product made under the patent and its commercial success
- The utility and advantages of the patented property over prior approaches
- The portion of the profit or selling price that should be credited to the patented invention as opposed to non-patented elements
- The opinion testimony of qualified experts on both sides
Not all 15 factors carry equal weight in every case. The factors most relevant to your specific technology and market will drive the analysis. A patent attorney with litigation experience can help you identify which factors favor your position and how to build the supporting evidence before trial.
Comparable License Agreements
One of the most powerful tools for establishing a reasonable royalty is a comparable license, which is an actual license agreement for the same or similar technology that shows what the market has already determined the technology is worth.
If the patent holder has licensed the patent to others, those agreements are strong evidence. If not, licenses for comparable technology in the same field can serve as benchmarks.
Gearhart Law handles patent infringement litigation for businesses throughout New Jersey and beyond. If your patent has been infringed, reach out for a free half-hour consultation before you decide on your next move.
Willful Infringement and Enhanced Damages
If the infringement was willful, meaning the infringer knew about the patent and copied the technology anyway, the court has the discretion to award enhanced damages of up to three times the compensatory damages amount under 35 U.S.C. § 284.
The Halo Standard
In Halo Electronics, Inc. v. Pulse Electronics, Inc. (2016), the Supreme Court set the current standard for willful infringement. Enhanced damages are reserved for the most serious cases, such as deliberate copying, bad-faith infringement, or conduct that is intentionally harmful. Courts look at what the infringer knew and intended at the time, not a fixed list of requirements.
Why Willfulness Changes the Litigation Dynamic
Finding willful infringement does not guarantee treble damages. The court still decides whether to award them and how much, but the possibility alone changes the dynamics of the case. An infringer who knows they could face triple damages, has a much stronger reason to settle. A patent holder with solid evidence of willfulness has significantly more negotiating power.
In cases where the infringement was especially egregious or the infringer behaved unreasonably throughout the litigation, the court may also order the infringer to pay the patent holder’s attorney’s fees under 35 U.S.C. § 285.
Lost Profits vs. Reasonable Royalty: Choosing the Right Theory
The choice between lost profits and reasonable royalty is one of the most important strategic decisions in a patent infringement case. Here is how the two theories compare:
| Lost Profits | Reasonable Royalty | |
| What it covers | Specific sales you lost because of the infringement | A license fee the infringer should have paid |
| When it applies | When you can prove you would have made those sales | Always available as a minimum floor |
| Potential value | Generally higher when provable | Lower but guaranteed |
| Evidence required | Market demand, capacity, absence of alternatives, specific profit figures | Comparable licenses, Georgia-Pacific factors, expert testimony |
| Difficulty | Harder to establish | More straightforward to prove |
| Best used when | You competed directly with the infringer in the same market | Lost profits are hard to prove or only partially provable |
Many patent holders pursue both. Lost profits for proven lost sales and reasonable royalty for any remaining infringing sales not covered by the lost profits calculation. The decision also affects expert witness strategy, discovery priorities, and litigation budget. A patent litigation attorney should be advising on damages theory from the earliest stages of the case.
Pre-Judgment Interest and Other Damages Elements
On top of the core damages award, courts can also add pre-judgment interest. This compensates the patent holder for the time they spent waiting to be paid, from the date infringement began to the date of judgment.
In federal patent cases, courts have discretion in choosing the interest rate. Some use the prime rate. Others use Treasury bill rates. The difference between those rates can become significant in high-value cases with long litigation timelines.
The right rate to argue for depends on the specific facts of your case and is something your litigation attorney should address early in the damages analysis.
Protect What You Have Built and Recover What You Are Owed
Patent infringement damages are not self-executing. Proving what you are owed requires the right legal theory, the right economic experts, and the right evidence, all assembled in a way that satisfies the specific standards courts apply. Getting any one of those wrong can leave significant recovery on the table.
Gearhart Law handles patent litigation for businesses throughout New Jersey, including Summit, Millburn, Westfield, New Brunswick, and beyond. If your patent has been infringed and you want to understand what your case may be worth, leave your details and we will be in touch, or call 908.273.0700 for a free half-hour consultation.
Frequently Asked Questions About Patent Infringement Damages
1. What damages can I recover if someone infringes my patent?
Under 35 U.S.C. § 284, you are entitled to damages adequate to compensate for the infringement, but no less than a reasonable royalty. Depending on the facts of your case, that may include lost profits on sales you lost to the infringer, a reasonable royalty on infringing sales, enhanced damages of up to three times the compensatory amount if the infringement was willful, and attorney’s fees in exceptional cases.
2. What is the difference between lost profits and reasonable royalty?
Lost profits compensate you for the actual sales you lost because of the infringement. Reasonable royalty is the minimum you are owed, accounting for what the infringer should have paid for a license. Lost profits are generally higher when you can prove them, but they require more evidence. Reasonable royalty is generally available as a floor even when lost profits cannot be fully established.
3. What is the Panduit test?
The Panduit test is the four-factor framework courts use to determine whether a patent holder can recover lost profits. You must prove demand for the patented product, the absence of acceptable non-infringing substitutes, your capacity to meet the demand the infringer captured, and the specific amount of profit you would have made. All four factors must be satisfied to recover lost profits.
4. What are the Georgia-Pacific factors?
The Georgia-Pacific factors are up to 15 considerations courts use to determine a reasonable royalty in a hypothetical negotiation between the patent holder and the infringer. They include comparable license rates, the commercial success of the patented product, the utility of the patented feature over prior approaches, and expert testimony on both sides. The most relevant factors depend on the specific technology and market involved.
5. What is willful infringement, and does it affect damages?
Willful infringement occurs when an infringer knew about the patent and copied the technology anyway, often described as egregious or wanton conduct under the Halo Electronics standard. If willfulness is found, a court may award enhanced damages of up to three times the compensatory amount. Willfulness also strengthens the case for attorney’s fees under 35 U.S.C. § 285. The possibility of enhanced damages significantly affects settlement negotiations.
6. How does the entire market value rule affect my damages calculation?
If your patent covers only one feature of a multi-component product, your damages are generally limited to the value attributable to the patented feature, not the total product revenue. The entire market value rule allows recovery on the full product only if the patented feature drives customer demand for the whole product. This is a critical issue for technology companies where the patented feature is one of many in a complex product.
7. How long does patent infringement litigation take, and what does it cost?
Patent infringement litigation in federal court typically takes two to four years from filing to trial, depending on the complexity of the case and the court’s docket. Costs vary significantly based on the technology involved, the number of patents at issue, and whether the case goes to trial or settles. Most patent cases settle before trial. Gearhart Law works with businesses to assess whether litigation makes economic sense given the damages at stake and advises on settlement strategy throughout the process. Contact us for a free half-hour consultation.