Elizabeth A. O'Brien

Elizabeth A. O'Brien is Of Counsel at Cherian Harkins Dunham (CHD Law), a firm specializing in intellectual property litigation. The firm, which rebranded from Cherian LLP in January 2026, focuses on patent, trademark, copyright, and trade secret disputes across a wide variety of technologies and business sectors. Her practice aligns with the firm's broader emphasis on representing innovators and disruptors in various technological fields, including those involving proxy server patents, inflatable products, and Power-Over-Ethernet industry standards.

Ms. O'Brien's tracked appearances indicate a plaintiff-side focus, with one recorded appearance as plaintiff-side Of Counsel in case 23-2442 [User provided data]. Cherian Harkins Dunham, as a firm, engages in both plaintiff and defendant-side patent litigation, representing clients defending against infringers as well as those asserting patent rights.

In addition to district court litigation, Cherian Harkins Dunham boasts extensive experience in post-grant proceedings before the Patent Trial and Appeal Board (PTAB), including Inter Partes Reviews (IPRs), Post-Grant Reviews (PGRs), reissue proceedings, and ex parte re-examinations. The firm is noted for using the same legal team across federal court, USPTO proceedings, and appeals to ensure a consistent and comprehensive legal strategy. No specific notable case outcomes are individually attributed to Ms. O'Brien in the available public information beyond her listed case appearance.