Jeffrey Johnson

Eric Enger is able to provide deep understanding of the issues at the heart of patent disputes involving complicated technology. Clients look to him for his skills in running cases, formulating legal strategies, writing compelling briefs, and oral advocacy. He manages cases with extreme diligence and attention to detail. Mr. Enger’s practice focuses on patent litigation and post-grant challenges at the U.S. Patent Trial and Appeal Board. He prosecutes and defends high-tech companies in ...

Michael Childs is a graduate of Texas A&M University, where he received a Bachelor of Science in Journalism. He received his Juris Doctorate from South Texas College of Law, with a focus on civil litigation. Mr. Childs first came to the firm in 1996 as a law clerk and became an associate in November 1996. He has over fourteen years of extensive experience with complex family matters. As a litigator, his representation has included divorce, disputed property valuations and divisions of pro...

Ivan M. Rodriguez is a top attorney recognized by Best Lawyers in the practice area(s) of Admiralty and Maritime Law and Insurance Law. Ivan M., who practices law in Houston, Texas, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Ivan M. is held by other top lawyers in the same geographic and legal practice area.

Carlyn Burton is a top attorney recognized by Best Lawyers in the practice area(s) of Patent Law. Carlyn, who practices law in Houston, Texas, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Carlyn is held by other top lawyers in the same geographic and legal practice area.

Adam H. Laughton guides health care providers and other parties through the complexities of health care transactions, including inevitable regulatory questions, licensing, payor enrollment and many other issues. Adam has handled transactions involving a wide variety of providers and facilities, including hospitals, ambulatory surgery centers, behavioral health providers and freestanding emergency rooms, as well as physician practices and other entrepreneurs in the health care space. These tra...

Shawn Bates has more than 22 years of practice in commercial litigation in the energy industry and across numerous other industries. He is a seasoned first-chair trial lawyer, handling cases worth tens of millions. He has conducted hundreds of depositions and supervised trial teams on matters of varying size. He focuses his practice on litigation and arbitration of complex disputes for clients in the energy sector (oil and gas companies, oilfield supply and support companies, pipeline builder...

Lisa M. Kaufmann is a top attorney recognized by Best Lawyers in the practice area(s) of Admiralty and Maritime Law, Railroad Law and Transportation Law. Lisa M., who practices law in Houston, Texas, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Lisa M. is held by other top lawyers in the same geographic and legal practice area.

Charley Davidson leads the firm’s criminal defense practice, where he offers passionate, responsive counsel to guide clients facing state and federal charges in the areas of white collar and blue collar crime. Prior to joining Hanszen Laporte, he was a partner at a large international firm specializing in white collar defense, as well as a partner at a Houston-based criminal defense law firm. Charley also spent three years as an assistant U.S. attorney in the U.S. Attorney’s Offic...

For over 22 years, Marrick Armstrong has practiced personal injury, commercial dispute, and labor and employment law. He has represented clients proceeding as defendants and plaintiffs. His clients have been individuals, small and family-owned businesses, large publicly traded companies, multi-national corporations and governmental agencies. Marrick has extensive experience in claims, litigation, arbitrations, mediations, and trying cases to bench awards and jury verdicts in federal and state...

Heim, Payne & Chorush co-founder Michael Heim specializes exclusively in intellectual property litigation and antitrust lawsuits involving intellectual property. Mr. Heim represents plaintiffs and defendants throughout the United States in patent litigation in a wide range of technologies including microprocessors, computer architecture, memory control systems, cellular telephone systems, data transmission systems, on-line gaming systems, database caching software, logging-while-drilling ...