What do these registration numbers mean? or Why don?t I have any registration numbers in my C&D?
Do not be led astray by the registration numbers: trademark rights in the United States arise from use of the mark in commerce, not from registering. However, both state and federal law can provide relief from trademark infringement. If your opponent has registered its mark on the Patent & Trademark Office?s register, then you know that litigation about the mark could occur in federal court. If your opponent has not included any registration numbers, you still could be sued in federal court, but your opponent might simply be relying on state law (or just trying to scare you). If the C&D does not reveal any registration numbers, you should ask if the marks are registered. If the opponent has included registration numbers, look them up on the Patent & Trademark Office’s Trademark Electronic Search System (TESS). You can check the status of a trademark by entering the registration number into TESS’s search engine.
