What is a Patent Bar Exam?

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  • Written By: C. Mitchell
  • Edited By: John Allen
  • Last Modified Date: 08 November 2019
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The phrase “patent bar exam” refers to an exam that attorneys or lawyers must pass in order to practice before a country’s patent-granting body. All countries have specific requirements for patent law practice. Patent law around the world is a restricted, complex area of law that almost always requires passage of a difficult exam. The United States is one of the only jurisdictions that requires an exam specifically called the patent bar exam, but the term has come to generally describe a country’s patent law exam, no matter its specific title.

Only patent lawyers need to sit for and pass the patent bar exam. Patent lawyers are lawyers responsible for preparing patent applications on behalf of clients, prosecuting patents before the national patent agency, and challenging patents as infringing. Patent lawyers should not be confused with patent agents, who are generally government employees assigned to review and approve or reject patent applications. Patent agents have certain entry requirements and exams, too, but the patent bar exam is exclusively for lawyers.


The U.S. patent bar exam is an exam administered by the U.S. Patent and Trademark Office. In order to even be eligible to sit for the patent bar exam, a lawyer must have already passed a state bar exam or the bar exam of another country, and must hold a law degree from an accredited law school. The patent bar is generally regarded as the toughest legal exam to pass in the United States. As of 2010, it carried a fail rate of approximately 60%. There is no limit on how many times a person may sit for the exam.

In the United Kingdom, the system is similar. U.K.-based lawyers must pass a “Chartered Patent Attorney Qualification.” Unlike in the United States, however, lawyers in the UK can enter patent practice without first entering general practice. Once armed with a law degree, law students can sit for the patent qualification right away. The chartered exam is generally just as challenging as its U.S. equivalent.

Passing the patent qualification will allow British lawyers to practice patent law in Britain, but additional exams are required to practice patent law in the larger European Union. There exists no unified EU patent law, and each EU country has its own set of rules and laws for patent practice. In order to practice patent law broadly the EU, lawyers have two options: they can either meet the examination requirements of each country in which they want to practice, or they can try to qualify as a European Patent Attorney. In order to become a European Patent Attorney, a lawyer must first be qualified as a patent lawyer in some EU member country, and must then apply to sit for the European Patent Attorney Qualification, a series of four additional exams.

Part of the reason that patent practice is so exclusive is that, of all areas of law, it is the most technically complex. Patent applications and prosecutions regularly involve disputes about highly specific questions of science and engineering. Successful patent practice requires not only knowledge of the law, but also an ability to apply facts to that law to ensure that only legitimate and sufficiently unique inventions receive national patent protection. Patents comprise only a small sector of intellectual property law. Failure to pass a patent bar exam in no way limits a lawyer’s ability to practice in related fields, such as trademark or copyright law — neither of which usually require any special exams.


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