
Patents are a type of intellectual property that grants its owner the legal right to exclude others from making, using, or selling an invention for a limited period, typically 20 years. The grant and enforcement of patents are governed by national laws and international treaties, and they are granted by national or regional patent offices. Patent law is a specialised field of law within the broader scope of intellectual property law, and it plays a significant role in stimulating technological advancements and protecting inventors' rights. The core objective of patent law is to safeguard the rights of inventors and deter patent infringement. The term common law refers to a commonly held set of unwritten laws that are not officially codified but are instead set by legal precedent in the courts. Common law trademarks are harder to enforce, and it is the business owner's responsibility to enforce their common law rights.
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What You'll Learn

Common law trademarks
While common law trademarks offer some protection, they are harder to enforce than registered trademarks. It is the responsibility of the business owner to defend their common law trademark rights and oppose any potentially infringing registered trademarks or patent applications within five years. To enforce their rights, businesses must be able to demonstrate prior use of the trademark in the relevant geographic area.
To ensure their brand is protected, businesses should conduct thorough searches to determine if their desired name or image is already protected under common law or registered trademarks. This includes checking business directories, website domain sites, phone directories, and regular search results, as well as federal and state trademark registries.
Although common law trademarks do not have an expiration date like registered trademarks, they are more challenging to defend and may be vulnerable to infringement by others. Therefore, it is crucial for businesses to conduct comprehensive research and seek legal advice to ensure their trademarks are adequately protected.
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Common law rights
In the context of intellectual property, common law trademarks are acquired by a business simply by using a logo, business name, or tagline. Common law trademark rights go to the business that uses the trademark first and can only be enforced in the geographic area where the trademark is used. It is important to note that common law trademarks are harder to enforce than registered trademarks. As a business owner, it is the responsibility of the owner to enforce their common law rights. A registered trademark or patent application could infringe on common law trademark rights, and it is the owner's duty to oppose such an application within five years of its submission.
While trademarks are covered under common law, patents are not. Patents are a form of intellectual property that grants its owner the legal right to exclude others from making, using, or selling an invention for a limited period, typically 20 years from the filing date of the application. Patent law is territorial in nature, and a patent is only useful for protecting an invention in the country in which it is granted. The grant and enforcement of patents are governed by national laws and international treaties. Patent law falls under the umbrella of intellectual property law and plays a crucial role in stimulating technological advancements and protecting inventors' rights.
In the United States, patent law is codified in Title 35 of the United States Code. The patentability of inventions is defined under Sections 100-105, with Section 101 outlining the subject matter that can be patented, Section 102 defining novelty and statutory bars, and Section 103 requiring that an invention be non-obvious. Patent applications can be filed at the United States Patent and Trademark Office (USPTO), and upon grant, the patent holder gains exclusive rights to the patented invention within the United States.
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Common law IP
Intellectual property (IP) is a valuable asset for any business, and it is important to understand the nuances of IP law to protect your business's IP rights. While common law does not protect IP, it does cover trademarks. Trademarks are a type of IP, and common law trademarks are acquired by using a logo, business name, or tagline. Common law trademark rights are given to the business that uses the trademark first, and they can only be enforced in the geographic area where the trademark is used.
It is important to note that common law trademarks are harder to enforce than registered trademarks. As a business owner, it is your responsibility to enforce your common law rights. If a registered trademark or patent application is similar to your common law trademark, you must oppose it within five years to protect your trademark rights.
To ensure your business's valuable IP is protected, it is essential to understand the different types of IP and the laws that govern them. Patents, copyrights, trademarks, and trade secrets each have their own set of ownership and usage laws. Patents protect inventions, copyrights protect creative works, and trademarks cover branding.
Patent law, a branch of intellectual property law, governs the granting, enforcement, and protection of patents. It provides inventors with exclusive rights to their inventions for a limited time, allowing them to control the production, use, sale, and importation of their patented inventions. Patent applications must include claims that define the scope of protection sought, and patents are granted by national or regional patent offices.
In summary, while common law does not directly protect intellectual property, it does cover trademarks. To safeguard your business's IP, it is crucial to understand the specific laws pertaining to each type of IP and take the necessary steps to secure your rights.
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Common law patent rights
Common law, in the context of intellectual property, refers to a commonly held set of unwritten laws that are not officially codified but are instead set by legal precedent in the courts. Common law comes into play when the outcome of a case or dispute cannot be conclusively determined by referencing an official law.
Trademarks are typically covered under common law. A business may acquire a common law trademark by using a certain logo, business name, or tagline. Common law trademark rights go to the business that uses the trademark first, and these rights can only be enforced in the geographic area where the trademark is used.
While trademarks are covered under common law, patents are not. Patents are a form of intellectual property that grants its owner the legal right to exclude others from making, using, or selling an invention for a limited period, usually 20 years from the filing date of the patent application. In most countries, patent rights fall under private law, and the patent holder must sue infringers to enforce their rights.
Patent law is a specialised field of law within the broader scope of intellectual property law. It is a unique legal framework designed to provide exclusive rights to inventors for their novel, new, and useful inventions. The core objective of patent law is to safeguard the rights of inventors, allowing them to control the production, use, sale, and importation of their inventions.
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Common law vs codified law
Common law and codified law are two distinct legal systems with different characteristics and applications. Common law refers to a set of unwritten laws that are not officially codified but are instead established by legal precedents in court decisions. It is based on the principle of stare decisis, which means "to stand by things decided." Common law systems, such as English law, rely on judicial decisions and legal precedents to guide future cases.
In contrast, codified law, or civil law, is a system of law that is written down and organised into codes or statutes. Civil law jurisdictions, such as those in continental Europe, rely on these written codes to determine the outcome of legal disputes. Codification is the process of converting judge-made laws or uncodified statutes into formal, written laws. While common law systems have some codified laws, they are characterised by a reliance on judicial decisions and common law principles.
One key difference between the two systems is their approach to contract law. In civil law jurisdictions, contracts tend to be shorter and may not include all the terms governing the relationship between the parties. This is because civil law systems rely on the operation of law to remedy any inadequacies or ambiguities in the contract. In contrast, common law jurisdictions place more importance on setting out all the terms of the contract, resulting in longer and more detailed contracts.
Another difference lies in their historical origins and the countries that adopt them. Common law systems are typically found in countries that were former British colonies or protectorates, such as the United States, Australia, and New Zealand. On the other hand, civil law systems have their roots in continental Europe, with notable early examples like the 16th-century Statutes of Lithuania. The French Napoleonic Code of 1804 heavily influenced the legal systems of many countries and contributed to the spread of codified law.
In terms of patent protection, both common law and codified law systems recognise the importance of patents in stimulating innovation and protecting inventors' rights. However, the specific laws and procedures for obtaining patent protection may vary between these systems. Common law jurisdictions, such as the United States, offer different types of patents, including utility patents, design patents, and plant patents, each with its own legal protection. In contrast, codified law systems may have more standardised patent laws and procedures across the jurisdictions that adopt them.
In summary, common law and codified law represent two distinct approaches to legal systems, with common law relying on judicial decisions and precedents, and codified law depending on written codes and statutes. These differences have implications for various areas of law, including contract law and patent protection, and they continue to shape the legal landscapes of countries around the world.
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Frequently asked questions
Common law refers to a set of unwritten laws that are not officially codified but are instead set by legal precedent in the courts. Common law comes into play when the outcome of a case or dispute cannot be determined by referencing an official law. Trademarks are covered under common law. Common law trademarks are harder to enforce, and it is the business owner's responsibility to enforce their common law rights.
Patent law is a specialised field of law within the broader scope of intellectual property law. It is a unique legal framework designed to provide exclusive rights to inventors for their novel, new, and useful processes, or non-obvious inventions. Patent law plays a significant role in stimulating technological advancements and protecting inventors' rights.
Patent holders possess the right to exclude others from making, selling, and, in some cases, using their invention. They also have the right to sue infringers. The threat of a lawsuit is often enough to deter potential infringements.











































