File and register a trademark to protect your business name or product name. Applying to register a trademark is simple and affordable with LegalZoom.Filing for a trademark can protect your brand. This simple guide talks you through filing the paperwork, what it costs, and more. How do I file a Trademark Registration? See RCW 19.77 for guidance and what is required to register a Trademark in the State of Washington. Find out how to get started with this easytofollow explanation of how the registration process works, how much it costs, how long it takes and more. Virtual mail lets you keep a mailing address in Washington without having to pay for real estate, and you can check mail in your virtual mailbox, from anywhere. RCW 19.77 sets out Washington's trademark registration law. Washington's law is modeled after the Model State Trademark Bill (MSTB).