<p>Law schools take applicants with all kinds of majors. There is no law school requirement that says for patent law you need a science or engineering degree. That is really an issue of being able practice and getting hired as generally patent lawyers are expected to have at least an undergraduate science or engineering degree, e.g., many patent firms won’t even consider you without such an undergraduate degree. Patent lawyers are also expected to take the patent bar exam for practicing before the federal patent office. Note, you do not need a law degree to take that test but it is heavy both on engineering/science and law.</p>
<p>As to any work experience in any particular field, the answer is usually there are not such expectations. However, work experience after college can help particularly for some law schools like Northwestern which favors those with a couple or more years of work experience after college that is related to whatever their degree is (and it does not have to be in any way law related).</p>