Inherency is a puzzle that runs throughout patent law. Patents are based upon descriptions of technology. However, technologies may have qualities that are unappreciated or unidentified in a patent description, but which are nonetheless present. The law refers to these unknown attributes as...

It is a fundamental principle of patent law that no one infringes a patent unless they practice the complete invention. Nonetheless, patent courts have long recognized that focusing only on the party who actually practices the invention will sometimes let off the hook the party who most deserves...

Universities and companies are rushing to the patent office in record numbers to patent nanotechnology inventions. This rush to the patent office is so significant that many law firms have established nanotechnology practice groups, and the U.S. Patent and Trademark Office has now created a new...

Economists often assume that a patent gives its owner a well-defined legal right to exclude others from practicing the invention described in the patent. In practice, however, the rights afforded to patent holders are highly uncertain. Under patent law, a patent is no guarantee of exclusion but...

The patent statute creates a general set of legal rules that govern a wide variety of technologies. With only a few exceptions, the statute does not distinguish between different technologies in setting and applying legal standards. In theory, then, we have a uniform patent system that provides...

While the theory of the patent system is premised on the idea that patents will be used to exclude competitors, only a tiny fraction of patents are ever enforced. Legal and economic scholars have theorized as to how to identify valuable patents based on their individual characteristics. In this...

Intellectual property (IP) is a form of regulation. Once we understand IP laws as government social policies that seek to alter market outcomes, we can start to think of those laws as part of a broader tapestry of government rules that affect innovation in a complex variety of ways. Sometimes...

How can we fix the PTO, allowing examiners to effectively distinguish between patentable and unpatentable inventions, without slowing the process to a crawl or wasting a bunch of money? This essay reviews the recent literature and considers a number of proposals and their problems. It concludes...

As robots and artificial intelligence (AI) increase their influence over society, policymakers are increasingly regulating them. But to regulate these technologies, we first need to know what they are. And here we come to a problem. No one has been able to offer a decent definition of robots and...

Trademark owners regularly overreach. They often threaten or sue people they have no business suing, including satirists, parodists, non-commercial users, and gripe sites. When they do, they often justify their aggressive legal conduct by pointing to the need to protect their trademarks by...