
Common law trademark rights are automatic protections that arise from using a trademark in commerce within a particular geographic area. They are not governed by statute but have been developed under a judicially created scheme of rights governed by state law. Common law trademarks are not registered, and therefore, it can be difficult to establish whether anyone has trademark rights to a particular mark. While common law trademarks are effortless to obtain, they are much harder to enforce, and their authority does not have the same nationwide range as federally registered trademarks.
| Characteristics | Values |
|---|---|
| Registration required | Not required |
| Protection | Limited to the geographic area in which the mark is used |
| Symbol | ™ |
| Registration symbol | Not permitted |
| Rights | Based on use of the trademark in commerce within a particular geographic area |
| Enforceability | Not easily enforced |
| Protection | Does not prevent a competitor from setting up a shop with the same name in a different location |
| Advantages | Less expensive, easier to obtain, and may prevail over a federal registration in case of an earlier, proven first-use date |
| Disadvantages | Lack of enforceability, regional restrictions, and difficulty in providing notice of your common law rights to others |
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What You'll Learn
- Common law trademark rights are acquired by using a trademark in commerce
- Common law trademark rights are limited to a specific geographic area
- Common law trademarks are not registered, so they can be hard to enforce
- Common law trademarks can be defended against federal trademarks with an earlier first-use date
- Common law trademark rights can be lost if not maintained, unlike federal trademarks

Common law trademark rights are acquired by using a trademark in commerce
While common law trademarks are easy to obtain, they are more difficult to enforce. This is because there is no public record of a common law trademark or when its use began, and its protection is limited to the geographic area in which the mark is used. For example, a common law trademark in Southern California may prevent another business from selling a similar product under the same name in Los Angeles, but it would not prevent a competitor from using the same name in San Francisco or elsewhere in Northern California.
To strengthen common law trademark rights, businesses can register their trademarks with the U.S. Patent and Trademark Office (USPTO). Federal registration provides additional rights and protection not available under common law, including the right to bring a lawsuit concerning the trademark in federal court and the ability to record registration with U.S. Customs and Border Protection (CBP) to stop the importation of goods with an infringing trademark. Federal registration also makes it easier to apply for foreign trademark registrations.
It is important to note that common law trademarks can hinder a federal trademark application if a proper clearance search was not performed prior to submission to the USPTO. A comprehensive trademark search includes a search of the USPTO database, industry-specific directory searches, business filing searches, social media searches, and domain searches.
Overall, while common law trademark rights are acquired through the use of a trademark in commerce, federal registration provides enhanced protection and enforcement capabilities for trademarks.
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Common law trademark rights are limited to a specific geographic area
Common law trademark rights are territorial and limited to the geographic area in which the mark is used. These rights are based on the use of the trademark in commerce within a particular geographic area. For example, if a coffee blend is sold under the name "Blaster" in California only, the trademark rights to that name exist only in California. Similarly, if you sell a product only in Southern California, your common law trademark may prevent another business from selling the same type of product under a similar name in Los Angeles. However, you will not be able to prevent a competitor from setting up shop with your name in San Francisco or elsewhere in Northern California.
Common law trademark rights are acquired automatically when a business uses a name or logo in commerce, and are enforceable in state courts. These rights are not governed by statute but have been developed under a judicially created scheme of rights governed by state law. There is no application or registration process for common law trademarks, and there are no fees associated with attaining a common law mark.
While common law trademarks are effortless to obtain, they are much trickier to enforce due to their regional restrictions. Unlike federal trademarks, common law trademarks do not offer nationwide protection. This means that another business in a different state can operate under the same name, which could have detrimental effects on your online presence or retail services if consumers are confused as to which store is the original.
To overcome these limitations, businesses can register their trademarks with the U.S. Patent and Trademark Office (USPTO). Registering a trademark with the USPTO gives businesses the right to use the ® symbol and provides legal presumption and protection to use the trademark nationwide, preventing others from using a similar mark for similar goods or services. Additionally, federal registration makes it easier to apply for foreign trademark registrations and stop the importation of infringing goods.
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Common law trademarks are not registered, so they can be hard to enforce
A common law trademark is a trademark established through the use of a business name, product name, tagline, or logo in commerce in a specific geographical area. Unlike federally registered trademarks, common law trademarks are not registered with the USPTO or any other government agency. Instead, they are governed by state law and are limited to the geographic area in which the mark is used. For example, if a coffee blend is sold under the name "Blaster" in California only, the trademark rights to that name exist only in California.
While common law trademarks are easy to obtain, enforcing them can be challenging. This is because there is no public record or central database of common law trademarks, making it difficult for others to know about your trademark rights. Competing businesses may unknowingly use similar marks, which can lead to confusion among customers. Additionally, common law trademarks are regionally limited and do not provide nationwide protection. This means that another business in a different state may use the same or similar trademark without infringing on your rights.
The lack of a registration process and associated fees for common law trademarks is a benefit for small businesses or startups that may not have the resources for federal registration. However, federal registration provides substantial additional rights and protections. It allows trademark owners to use the ® symbol, deterring others from using similar trademarks. Federal registration also enables trademark holders to file lawsuits in federal court and provides a legal presumption of the right to use the trademark nationwide.
To enforce common law trademark rights, it is essential to establish prior use of the trademark in the specific geographical area. This can be challenging without a public record of trademark use, and common law trademark owners may bear the burden of proof in infringement cases. While common law trademarks have their advantages, they may not be sufficient for businesses looking for long-term protection, especially as their business expands into new markets. Therefore, federal registration with the USPTO or state trademark registration is often recommended to strengthen trademark rights and make enforcement easier.
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Common law trademarks can be defended against federal trademarks with an earlier first-use date
A common law trademark is a trademark that is established through the use of a name or logo in commerce in a specific geographical area. These rights are not governed by statute but are instead developed under a judicially created scheme of rights governed by state law. Common law trademark rights are limited to the geographic area in which the mark is used. For example, if a business sells a product only in southern California, their common law trademark may prevent another business from selling the same type of product under a similar name in Los Angeles. However, it will not prevent a competitor from setting up shop with the same name in San Francisco or elsewhere in northern California.
Common law trademarks have no registration requirement, which can make it difficult to discover whether anyone has trademark rights to a particular mark. This can lead to issues with trademark clearance searches, which would otherwise only need to examine trademark registers. Common law trademarks are also more difficult to enforce due to the lack of a public record of the trademark or when its use began.
Federal registration of a trademark, on the other hand, provides additional rights and protection. It allows trademark holders to use the federal trademark registration symbol, ®, which may deter others from using a similar trademark. It also enables them to file a lawsuit in federal court and gives them a legal presumption of the right to use the trademark nationwide. However, federal registration does not automatically create worldwide rights, and each country's trademark office will review applications individually.
Despite the advantages of federal trademarks, common law trademarks can be defended against them if the common law trademark has an earlier, proven first-use date. This can hinder a federal application and may preserve the common law trademark holder's right to use their trademark in their geographic area, even if another business obtains a nationwide federal registration for the same mark. To ensure a new trademark does not infringe on an existing common law mark, a thorough clearance process should be conducted, including deep interest searches, industry-specific directory searches, business filing searches, social media searches, and domain searches.
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Common law trademark rights can be lost if not maintained, unlike federal trademarks
Common law trademark rights are acquired automatically when a business uses a name, logo, or phrase in commerce within a specific geographic area. These rights are not governed by statute but are instead developed under a judicially created scheme of rights governed by state law. As such, common law trademarks are limited to the geographic area in which the mark is used. For example, if a business sells a product with a particular trademark only in southern California, their common law trademark rights may prevent another business from selling the same type of product under a similar name in the same geographic area.
However, common law trademark rights can be difficult to enforce due to the lack of a public record of the trademark or its use. This can make it challenging to prove earlier trademark use and ownership of the mark, which could be easier with federal trademark registration. Unlike common law trademarks, federal trademarks are listed in the USPTO database, providing nationwide protection and serving as a deterrent to others from adopting a similar mark. Additionally, federal registration allows trademark holders to file lawsuits in federal court to enforce their rights and provides a legal presumption of the right to use the trademark nationwide.
While federal trademarks offer stronger protection, common law trademarks have certain advantages. Common law trademarks are effortless to obtain, requiring no application process or fees. In some cases, a common law trademark may even prevail over a federal registration if it has an earlier, proven first-use date in a specific region. This highlights the importance of conducting a comprehensive trademark clearance search before applying for federal registration to avoid potential conflicts with existing common law trademarks.
Despite the benefits of common law trademarks, they can be lost if not maintained properly. Unlike federal trademarks, which can last indefinitely as long as they are continuously used in commerce and maintained with periodic filings, common law trademarks rely solely on continuous use in commerce to maintain their rights. Discontinuing the use of a common law trademark in a specific geographic area may result in the loss of trademark rights in that region. Therefore, businesses relying on common law trademarks must consistently use their trademarks to maintain their rights, whereas federal trademarks provide more flexibility and protection even if there are periods of inactivity.
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Frequently asked questions
A common law trademark is a trademark established through use in commerce in a specific geographical area. Business names, logos, and phrases that are used regularly can be considered common law trademarks.
You acquire common law trademark rights automatically just by using your trademark in your business. There is no registration or application process required.
Common law trademark rights are limited to the geographic area in which the mark is used. You can enforce these rights in state courts. You can use the ™ symbol with your trademark.
Common law trademarks are easier to obtain but harder to enforce. Registered trademarks have a higher degree of protection in federal courts. They also allow you to use the ® symbol, and your registration will appear in a publicly accessible database.



































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