About Us Kaufhold & Dix Patent Law is a law firm dedicated solely to the practice of transactional intellectual property law – patents, trademarks and copyrights are our forte. From offices in Minnesota and South Dakota, we help inventors, artists and entrepreneurs across the country protect their intellectual property rights. With over two decades of experience, free initial consultations and flat fees that are truely flat, Kaufhold & Dix Patent Law is the go-to firm for all of your intellectual property needs.