The program provides free legal assistance to underresourced inventors interested in securing patent protection for their inventions. Apply online (TEAS).File a trademark application and other documents online through TEAS. The mark must be in use prior to filing the application. Information on filing for a provisional patent. You can complete the filing forms online at bsportal.sos.state.oh.us. The filing fee can be paid using one of the major credit cards. How to File a Trademark in Ohio? In your filing, you may request a refund of the petition fee if you couldn't file electronically due to a USPTO system error. Trademarks used in more than one state can be registered in the U.S. Patent and Trademark Office.