RCW 19.77 sets out Washington's trademark registration law. Washington's law is modeled after the Model State Trademark Bill (MSTB).What is a Trademark? The process of filing a patent in Washington State is similar to filing a patent anywhere in the United States. For information about Corporate Names and State Trademarks Contact: Office of the Secretary of State Corporations and Charities Division In general, submitting a successful application to the USPTO to register your trademark requires three central components. This research guide includes individual guides for conducting patent or trademark searches, as well as starting points for additional research. This page provides information on the types of patents and types of patent applications, and the examination process. Getting a patent in Washington is the same as any other state. The patent application is filed with the United States Patent and Trademark Office (USPTO).