The
service mark symbol (
℠, the letters
SM in superscript style) is a
symbol commonly used in the
United States to provide notice that the preceding mark is a
service mark. This symbol has some legal force, and is typically used for service marks not yet registered with the
U.S. Patent and Trademark Office; registered service marks are instead marked with the same symbol used for registered trademarks, the
registered trademark symbol ®. The proper manner to display the symbol is immediately following the mark in superscript style.