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Contact
Email
info@cjsjlaw.com
Phone
254-633-3011
Website
Address
Waco, TX, 76701, US
Professional
Bar Admissions
TexasU.S. District Court Northern District of TexasU.S. District Court Eastern District of TexasU.S. District Court Western District of TexasU.S. Court of Appeals Federal Circuit
About
Brett Mangrum has over two decades of intellectual property experience derived from all sides of the table. He is a named inventor on eight issued U.S. patents, several of which he wrote personally. While attending law school at night, Brett continued to work fulltime as an engineer developing cutting-edge nanoelectromechanical systems. Before graduating within the top 10% of his J.D. class, Brett served as an editor of the law review, he was published twice, and he retired from his successful engineering position to join a respected national law firm, where he continued to work fulltime focusing primarily on patent prosecution and patent litigation. In 2012, Brett transitioned to an in-house position as senior vice-president. His in-house responsibilities included overseeing monetization of the company’s extensive patent portfolio. This involved managing a team of in-house and external experts and working closely with external counsel on licensing and litigation efforts. While working in this complex role, Brett was named by DCEO Magazine as A Top Corporate Lawyer in Dallas-Fort Worth. Dovetailing his diverse engineering and legal experiences together, Brett opened up a private legal practice in 2015 that he continued to grow for nearly a decade based largely on client referrals. Brett’s present practice focuses primarily on helping clients to develop and monetize patent portfolios (including through litigation when necessary) and to defend the validity of their issued patents in post-grant review matters. In 2022, Brett ranked first nationally (by Patexia.com) as the most active inter parties review (IPR) attorney and, notwithstanding that volume, he also ranked eighth nationally that same year in achieving successful outcomes for patent owners. Brett’s extensive background enables him to efficiently recognize and master the complex technological and legal issues that matter most to a case.
About Intellectual Property Law
Intellectual property attorneys protect creative works, inventions, and brand assets. They handle patents, trademarks, copyrights, and trade secrets. Common matters include patents, trademarks, copyrights, trade secrets.
Recognition & Involvement
Awards
Personally ranked 1st among Most Active Attorneys Representing Patent Owners in Patexia 2022 IPR Intelligence Report. Click here to access the IPR Report | Personally ranked 8th in the Category of Best Performing Attorneys Representing Patent Owners in Patexia 2022 IPR Intelligence Report. Click here to access the IPR Report | Named in DCEO Magazine as A Top Corporate Lawyer in Dallas-Fort Worth – 2013 | Named inventor in eight U.S. Patents
Associations
J. Reuben Clark Law Society (served as officer of local chapter) | Dallas Bar Association (served as president of Computer Law Section) | Dallas Swing Dance Society (Teach vintage swing dance classes to youth) | USInventor.org (assist up-and-coming inventors navigate the current patent landscape)
Other Intellectual Property Attorneys in Waco, TX
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Updated: May 25, 2026