About Donald Jon
Donald Jon Ersler is a patent and trademark attorney based in Elm Grove, Wisconsin — He has been practicing law for over 30 years, specializing in intellectual property matters. His firm, Donald J. Ersler, S.C., offers services in patent writing and filing, patent searching and evaluation, patent infringement opinions, patent litigation, trademark filing, trademark searching. Advice for "designing around" patented products. Mr. Ersler earned his Juris Doctor from the University of Detroit Mercy School of Law in 1993.
He also holds a Bachelor of Science degree from the University of Wisconsin-Milwaukee. Before entering law, he gained 12 years of experience in mechanical and electronic engineering. This gives a strong technical foundation that complements his legal expertise. Throughout his career, Mr. Ersler has handled a diverse range of cases, including patent applications in mechanical, electrical, and software arts, patent and trademark litigation, and infringement analysis. He has represented both plaintiffs and defendants, demonstrating versatility and a knowledge of intellectual property law.
In addition to his legal practice, Mr. Ersler is actively involved in the Waukesha County Bar Association, reflecting his commitment to the local legal community. His firm, Donald J. Ersler, S.C., is located at 1165 Terrace Drive, Elm Grove, WI 53122. Clients have praised Mr. Ersler for his responsiveness, knowledge, and efficiency.
One client noted that he guided them through what they thought was going to be a very painstaking process, making it efficient, timely, educational. Painless. Mr. Ersler's experience and technical background make him a valuable resource for individuals and businesses seeking assistance with patent and trademark matters.
