Although not required by law, an unregistered trademark owner can append a name or symbol with a TM (and visualized by the trademark symbol ™) that serves as notice to the public that the words or symbols are an unregistered trademark.
Although not required by law to receive trademark protection, an unregistered trademark owner can append words, a name, graphics, or symbosl with a TM (and visualized by the trademark symbol ™). A ™ serves as notice to the public that the words or symbols are an unregistered trademark.