Donald J. Ersler, S.C. — Patent & Trademark Attorney
PATENT & TRADEMARK SERVICES
- •Patent writing and filing
- •Patent searching and evaluation
- •Patent infringement opinions
- •Patent litigation
- •Trademark filing
- •Trademark searching
- •Advice for "designing around" patented products
- •Pro se Patent Help
- •Pro se Trademark Help
- •Agent for filing patent application papers
- •Agent for signing trademark papers
About
US Patent Law Attorney in WI, CA, FL, IL, NY, TX | IP Patent Attorney
Don Ersler is a patent attorney with 30 years of experience in patent law, plus bachelor degrees in mechanical and electronic engineering, 12 years of engineering experience, and a juris doctor degree in law. As an experienced patent lawyer, Don has the know-how and skills to write the strongest possible patent application, avoid prior patents, and work around prior art. He will protect your invention or idea.
Don has written and prosecuted patent applications in a wide variety of technical areas, including mechanical, electrical, electronic, software, chemical, and business method inventions. He has experience with utility patents, design patents, plant patents, and trademark applications.
Don has a YouTube channel with videos explaining the patent process, patent costs, and other patent topics. He is also an Archery Patent Specialist, see all 100+ archery patents.
Don is licensed to practice before the United States Patent and Trademark Office (USPTO) and in the state of Wisconsin. He serves clients in all 50 states and internationally.
Testimonials
"Until we engaged Don Ersler as patent counsel our experience with several other firms had been, in the main, disappointing. His expertise in the fields of mechanical and electrical engineering coupled with his quick grasp of complicated issues result..."
"Don Ersler helped me complete my first aircraft patent. His diverse background including multiple engineering degrees gives him the ability to quickly understand and evaluate complex designs and concepts. The patent I attained with his help has proven to be most valuable..."
"I have recommended you to a few of my close friends. I like the way you work. Honesty and trust is not easy to come by lately."
"We received our final Patent information in the mail. I must say that was really cool to see the final/completed package put together. My Wife and I are very thankful for all of the hard work that you did to get this across the finish line for us..."
"Mr Ersler has represented me since the beginning of 2014 to secure a utility patent through the USPTO. He has, in a kind, steady and methodic fashion, completed the necessary patent search, worked with the draftsman to secure all drawings, provided progress reports, and was always available to answer and discuss the project by phone..."
"Attorney Donald Ersler has helped me with numerous intellectual property issues over the years. I have found his advice to be sound, his patient and thorough probing to be responsible, and his prices to be very reasonable. I recommend him without reservation..."
"If you are looking for a top-notch patent attorney, look no further than Mr. Donald Ersler. His keen ability to navigate the tumultuous waters of the patent process, from the initial search to any subsequent defense, leaves his clients feeling assured that they are dealing with a prompt and highly productive professional..."
"Attorney Ersler is by far the best patent attorney we've worked with. His expertise shines through in every thing he's done for us. He is very skilled in his art and easy to work with."
"I offer this letter of recommendation on behalf of patent attorney Don Ersler. I have trusted his judgment for patent applications and patent infringement matters. Unlike other patent attorneys, Don encourages me to think of alternative embodiments for my invention when filing a patent application..."
"Attorney Ersler has been easy to work with and is very helpful in walking clients through the process and explaining what happens each step of the way. We have been awarded both patents completed by Attorney Don Ersler and he made the process seem seamless."
"I have worked with Don Ersler on numerous patent applications. The most important consideration of working with Don is the ease of communication. He always responds in a timely fashion. I highly recommend Don."
"The application looks phenomenal, I still cannot believe you finished it that quickly. I showed it to my colleague who is an ICU physician at my hospital, and he was also extremely impressed and plans to reach out to you in the future with some ideas he has had."