You can file an application to register your trademark or service mark with an intenttouse (ITU) filing basis. The USPTO offers an online application through the Trademark Electronic Application System.We're going to talk about how to file your own trademark application with the united states patent and trademark office. Now, you are ready to pay the required fees for trademark and patent filing in California. In the Trademark Electronic Application System (TEAS), we have one initial application form with two filing options: TEAS Plus and TEAS Standard. You can file the application, forms, documents, and pay fees online on the USPTO official site. Here is a step-by-step guide walking you through the process of successfully registering a state-level trademark in California.