I looked at Will Robertsons answer to
Entering Unicode characters in LaTeX
which explains how to enter a unicode character but it uses \textemdash and I don't know if a LaTeX command exists.
The unicode number is 2120 and it looks like:
I looked at Will Robertsons answer to
Entering Unicode characters in LaTeX
which explains how to enter a unicode character but it uses \textemdash and I don't know if a LaTeX command exists.
The unicode number is 2120 and it looks like:
Have you tried \textservicemark, a macro provided by the textcomp package? Its output looks like this:

Addendum In your comment, you mention you'd like to use Minion Pro as the font. Assuming that you can run either xelatex or lualatex on your system, the following MWE shows how you might get a Service Mark symbol (set here in "Myriad Pro", a sans-serif font which often accompanies "Minion Pro"):
\documentclass{article}
\usepackage{fontspec}
\setmainfont{Minion Pro}
\setsansfont{Myriad Pro}
\renewcommand\textservicemark{\ensuremath{{}^\textsf{\scriptsize SM}}}
\begin{document}
Some service\textservicemark
\end{document}

\scshape has no effect on uppercase letters.) (ii) Do you need the \thinspace?
– Mico
Jan 18 '12 at 15:45
The thin space is needed as otherwise it seems too close to the next character (using minion pro).
– Jonathan Evans Jan 18 '12 at 19:22
Some service$^{\textrm{\scriptsize SM}}$that you can make into command like, say,\smarkand useSome service\smark? – Werner Jan 17 '12 at 21:07\textsuperscript{\scshape sm}? – egreg Jan 17 '12 at 21:14