Joseph Haag retired from WilmerHale in 2025 after more than two decades with the firm. An experienced intellectual property lawyer, Mr. Haag focused on patent litigation, patent prosecution and client counseling throughout his career. After joining WilmerHale in 2001, he successfully represented a wide range of technology clients in federal courts and before the International Trade Commission.

Mr. Haag's patent litigation experience spanned technologies such as IT service management, electrochromic glass, cellular telephone and wireless devices, electronic circuitry and devices, non-volatile computer memory, lithography systems, and semiconductor fabrication and packaging. He also had extensive patent prosecution experience for mechanical, electromechanical and software inventions, and advised on due diligence investigations for corporate transactions.