Trademark infringement is the unauthorized use of a trademark or service mark on or in connection with goods and services in a manner that is likely to cause confusion, deception, or mistake about the source of those goods and services. The harm to the trademark owner can be significant and multidimensional: infringement can damage a brand's reputation, result in direct financial losses from diverted sales or brand dilution, and in serious cases halt business operations entirely. Because a trademark's value is built on the consumer recognition and goodwill it represents, any unauthorized use that blurs or undermines that association strikes at the core of what the mark is worth. TCP Law assists both trademark owners asserting infringement claims and businesses that have received infringement claims against them, and offers a free consultation to help you assess your position.

A successful trademark infringement claim requires establishing three elements. First, the plaintiff must have a valid and enforceable trademark — if the claim is based on a common law mark rather than a federal registration, it must also be shown that the mark is legally protectable and that the scope of protection encompasses the infringing use. Second, the defendant must be using a mark that is confusingly similar to the plaintiff's trademark. Third, that use must be in connection with goods or services that are the same or similar to those associated with the trademark, in a manner likely to cause confusion among consumers. All three elements must be present — a valid mark and similar goods alone are not sufficient if the marks themselves are clearly distinguishable.

Likelihood of confusion (LOC) is the central legal standard in trademark infringement — it occurs when a consumer is likely to mistake the source of goods or services offered under similar marks by different parties. In New York federal courts, LOC is evaluated using the Polaroid factors, a set of eight considerations used as a guide to assess whether confusion is probable. Those factors are: the strength of the trademark; the similarity of the marks; the proximity of the products and their competitiveness with one another; evidence that the senior user may "bridge the gap" by expanding into the alleged infringer's market; evidence of actual consumer confusion; evidence that the imitative mark was adopted in bad faith; the respective quality of the products; and the sophistication of consumers in the relevant market. Not all factors will be equally relevant in every case, and courts weigh them collectively rather than applying them as a rigid checklist.

Trademark dilution is a distinct legal theory that applies when a trademark is used in a way that harms the trademark owner's reputation or diminishes the unique association between the mark and the owner's goods or services — and critically, dilution does not require a showing of trademark infringement or likelihood of consumer confusion. In the United States, there are two types of dilution. Dilution by blurring occurs when the distinctiveness of a famous mark is impaired by unauthorized use — for example, using a famous brand name on an unrelated product in a way that weakens its unique identity. Dilution by tarnishment occurs when an unauthorized use of a famous mark is offensive and harms its reputation. Because dilution claims require the mark to be famous, this theory is most relevant to well-established brands with broad consumer recognition.

If the elements of trademark infringement are established, a court may award several forms of relief. These include an injunction to prevent the defendant from any further use of the infringing mark; compensation for damages caused by the infringement; and the seizure of any products infringing on the trademark. In appropriate cases, attorney's fees and costs may also be awarded. Additionally, treble damages — meaning damages multiplied by up to three times the actual amount — may be available in appropriate situations, typically where the infringement was willful or deliberate. The availability and scope of these remedies can depend significantly on whether the mark is federally registered, how long the infringement persisted, and the extent of harm caused, making early enforcement action generally more advantageous than allowing infringement to continue.

The Trademark Trial and Appeal Board (TTAB) is the USPTO's internal adjudicative body that handles certain trademark disputes outside of the federal courts. It handles three primary types of proceedings. Appeals allow applicants to appeal rejections issued by a USPTO examining attorney during the prosecution of a trademark application, providing an administrative review forum before resorting to federal court. Oppositions allow third parties who believe they may be harmed by the registration of a mark that has been approved and published in the Official Gazette to formally contest that registration. Cancellations allow third parties to petition to cancel an existing trademark registration if they believe they have been or will be negatively affected by it. TTAB proceedings follow formal procedural rules and involve discovery, briefing, and in some cases oral argument, making experienced trademark counsel important for navigating them effectively.

Yes — trademark infringement claims can be based on common law trademark rights arising from actual use of a mark in commerce, even without federal registration. However, when a claim is based on a common law mark rather than a federal registration, the claimant must affirmatively demonstrate that the mark is legally protectable and that the scope of the common law rights is broad enough to encompass the infringing use. This is a higher evidentiary burden than for federally registered marks, which carry a legal presumption of validity and nationwide scope. Common law rights are also generally limited to the geographic areas in which the mark has been actively used and recognized. For all of these reasons, federal registration strengthens both the practical and legal position of a trademark owner significantly when enforcement becomes necessary.

If your business receives a trademark infringement claim — whether through a cease-and-desist letter, a TTAB proceeding, or a federal lawsuit — it is important to take it seriously and respond strategically rather than ignore it or react hastily. The strength of the claim against you depends on whether the asserted mark is valid and enforceable, how similar your mark actually is to theirs, and whether your goods or services are sufficiently related to create a likelihood of confusion under the applicable legal standard. There may also be defenses available, including challenging the validity of the asserted mark, arguing that the marks are not confusingly similar, or contesting the scope of the claimed rights. TCP Law assists clients on both sides of trademark disputes — asserting claims and defending against them — and offers a free consultation to help you evaluate your exposure and options.

Bad faith — specifically, evidence that an imitative mark was adopted in bad faith — is one of the eight Polaroid factors that New York federal courts consider when evaluating likelihood of confusion in a trademark infringement case. Bad faith in this context typically means that the party adopting the similar mark was aware of the senior user's mark and intentionally chose a similar one to trade on the existing goodwill or cause consumer confusion. While bad faith is not required to prove infringement, its presence can significantly strengthen the plaintiff's case and influence the remedies available — courts are generally less sympathetic to defendants who deliberately copied or closely mimicked an established mark. Evidence of bad faith may include the defendant's awareness of the plaintiff's mark prior to adoption, the timing of adoption, and the degree of similarity between the marks.

Yes — exact copying is not required for trademark infringement, and this misconception leads many businesses to underestimate genuine threats to their brand. The legal standard is likelihood of confusion, not identity: a mark that is similar in appearance, sound, or meaning to an existing mark, used in connection with related goods or services, can constitute infringement even if it is not an exact duplicate. New York federal courts evaluate this through the Polaroid factors, which look at the totality of the circumstances — including how closely the marks resemble each other, how related the parties' goods or services are, and whether actual consumer confusion has occurred. A competitor who adopts a slightly altered version of your brand name, a phonetically similar logo, or a conceptually parallel slogan for competing products may be infringing your trademark rights even without copying you character for character.