August 26, 2019

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Software Is Still Patent Eligible

In recent years, software patents have come under fire from legislation (the American Invents Act) that has generally made patents easier to invalidate, and from court decisions (the Supreme Court’s decision in Alice v. CLS Bank[1] and its progeny) that have made computer-implemented inventions more vulnerable to subject matter eligibility challenges. Some observers have concluded that software patents are no longer worth pursuing. We disagree. Although there are real challenges, and patents on some software or other computer-implemented inventions may now be quite difficult (or even impossible) to obtain or enforce, a well-written and well-prosecuted patent application can circumvent many of these obstacles.

Recent Federal Circuit opinions have provided much-needed clarity and guidance on how to avoid having a patent application rejected or an issued patent invalidated for lack of patent eligibility. For example, in Enfish v. Microsoft, the court held that a software patent for a self-referential table was patent eligible because it was directed to a specific, asserted improvement in computer capabilities.[2] In BASCOM v. AT&T, the court held that a software patent on a specific, new customized content filter program on a remote ISP server was eligible because “the patent describes how its particular arrangement of elements is a technical improvement over prior ways of filtering such content.”[3] And, in McRO v. Bandai, the court held that a software patent requiring specific rules to render 3-D animations in a specific way was patent eligible because the use of the rules did not preempt others from animating with generic rules.[4]

These cases highlight the importance of showing how a claimed invention implemented by software (or software in combination with computing hardware) is both different from and provides advantages over prior solutions to a technological problem, and, more broadly, to existing approaches that might be considered well known, routine, or conventional. In our experience, providing explanations on this point within a patent application can have the effect of making the eligibility requirement a simple threshold issue, like making sure a patent claim is written clearly. Drafting patent claims so that they recite a specific and unconventional way of solving the problems described in the application may be all that is needed to satisfy the eligibility requirement. Of course, in order to strengthen the chances of success, the patent claims should be directed to a technological improvement that solves a technological problem, not to the mere automation of known economic practices or ways of organizing human activity.

The line between what is and what is not patent eligible is becoming clearer—provided you know how to interpret and apply the evolving jurisprudence governing patent eligibility requirements. Mintz Levin does. We are monitoring the evolving landscape closely and will continue to help our software clients successfully navigate through the obstacles they face in obtaining and litigating patents. Mintz Levin’s expertise comes in part from over a decade of writing and prosecuting patent applications in foreign patent systems that have a more stringent test for the patentability of computer-implemented inventions—one closer to the Alice standard now governing patent eligibility in the United States.


Alice Corp. v. CLS Bank Int’l, 134 S.Ct. 2347 (2014).

Enfish, LLC v. Microsoft Corp., 822 F.3d 1327, 1335-36 (Fed. Cir. 2016).

BASCOM Global Internet Servs. v. AT&T Mobility LLC, 827 F.3d 1341, 1350 (Fed. Cir. 2016).

McRO, Inc. v. Bandai Namco Games Am., 837 F.3d 1299, 1315 (Fed. Cir. 2016).

©1994-2019 Mintz, Levin, Cohn, Ferris, Glovsky and Popeo, P.C. All Rights Reserved.


About this Author

Michael D. Van Loy, Mintz Levin Law Firm, San Diego and San Francisco, Intellectual Property Law Attorney

Michael Van Loy is a Member in the Intellectual Property Section. His practice focuses on all aspects of IP portfolio strategy development including drafting and prosecution of patent and trademark applications; preparation of patentability, infringement, and validity opinions; litigation preparation and support; licensing negotiations; and other monetization approaches.

Michael drafts and prosecutes patents and advises clients on IP issues in a wide range of technical fields, including motor vehicle engines and braking systems,...

Michael T. Renaud, IP Litigation Attorney, Mintz Levin Law Firm

Michael’s practice is focused on patent litigation and also includes licensing, patents, copyrights, trademarks or trade secrets, and other intellectual property matters. His work in patent litigation primarily involves technologies such as electromechanical systems, digital cameras, embedded microprocessors, telecommunications and network software, cellular phones, and e-commerce, among others. Michael has also advised clients in regards to patent portfolios and IP diligence, and has counseled venture capital funds on their IP assets and patent value.

Michael rejoins Mintz Levin from Pepper Hamilton LLP.


Sandra Badin focuses her patent practice on appeals before the Federal Circuit and high-priority motions in the federal district courts and the U.S. International Trade Commission.  She has represented clients in many different technology fields with patents covering radio frequency transceivers, graphics processing units, LCD displays, medical records processing systems, electronic point-of-sale systems, high-density plasma cutting torches, dental materials and processes, specialty fabrics, and financial and business methods.  Sandra crafts winning appellate briefs and...

Matthew Karambelas, Intellectual Property Attorney, Mintz Levin Law Firm

Matthew joins the firm’s Intellectual Property practice having served as a Summer Associate in 2013, where he worked with the firm’s Intellectual Property Litigation group.  In 2012, Matthew worked as a Massachusetts Superior Court intern at the Essex County District Attorney’s Office. In this role, he conducted research and wrote memoranda for legal issues in criminal cases in addition to second-seating and supporting Assistant District Attorneys during trial.  

Nicholas Mouton, Mintz Levin Law Firm, Intellectual Property Attorney

Nicholas's practice is dedicated to intellectual property, namely patent prosecution. His experience focuses primarily on electronics, semiconductors, wireless communications, software, and information technology.

Prior to joining Mintz Levin, Nicholas worked as an attorney for one of the largest intellectual property firms in America. His primary responsibilities included drafting and prosecuting provisional and non-provisional patent applications for domestic and international filings.