### How to get copyright, trademark, etc.

The " Comprehensive symbol list", lists the symbol commands `\textcopyright`, `\textregistered` and `\texttrademark`, which are available in TS1-encoded fonts, and which are enabled using the textcomp package.

In fact, all three commands are enabled in default LaTeX, but the glyphs you get aren't terribly beautiful. In particular, `\textregistered` behaves oddly when included in bold text (for example, in a section heading), since it is composed of a small-caps letter, which typically degrades to a regular shape letter when asked to set in a bold font. This means that the glyph becomes a circled "r", whereas the proper symbol is a circled "R".

This effect is of course avoided by use of textcomp.

Another problem arises if you want `\textregistered` in a superscript position (to look similar to `\texttrademark`). Using a maths-mode superscript to do this provokes lots of pointless errors: you must use

      \textsuperscript{\textregistered}