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Generally, the overall cost for to obtain a design patent can range between $2000 and $3000. Maintenance fees are not required for design patents. We are not the most expensive and we are the not least expensive. However, we do not believe that choosing a patent law firm on the basis of cost alone is the best course.
Below provides a estimate of the costs to prepare a patent application depending on the complexity of the invention. 1  Very simple invention â $1,500 â $2,500. 2  Simple invention â $2,500 â $3,500.3  Medium complexity invention â $3,500 â $7,500. 4  Complex invention â $7,500 and up.here are generally three types of fees involved in obtaining a patent, (1) attorney fees, (2) professional drawings fees, and (3) Patent Office fees. Attorneys fees are fees for the work an attorney does to prepare the application, negotiate with the Patent Office, and to secure a patent on your behalf.