How To Use the Copyright, Trademark and Registered Symbols in HTML
From HowToGeek
If you've ever wondered how to use these symbols in HTML code, then we have the answer for you.
Copyright
The copyright © symbol can be created by using the following code:
©
Trademark
The trademark ® symbol can be created by using the following code:
®
Registered Trademark
The registered trademark ™ symbol can be created by using the following code:
™
These symbols can be used in whatever input box takes HTML code, including many blog comments and forum post boxes.