Specializing in patent illustration since1958
John R. Evans Drafting & Design is a full service, patent drafting firm located just outside the city of Philadelphia. We've been in the business of preparing patent drawings for 50 years. We have prepared drawings for tens of thousands of patent applications from painfully simple to painstakingly complex. A half of a century in the industry has provided us with an unparalleled level of experience and insight regarding the patent application process. This translates into security and peace of mind for all of our clients. We serve both individual inventors and large law firms with the same level of expertise and dedication.