The � symbol has no legal significance. The originator of any original work automatically owns the copyright of that work (unless it was created in the course of his employment, in which case the employer usually owns the copyright).
Internet copyright matters are complicated because different laws apply in different countries. In general though, you shouldn't copy pictures or symbols from someone else's website to your own. Whether it actually matters in the 'real world' would depend upon the type of symbol and its source.
For example, if you were to copy anything from the Disney website, or from the McDonald's site, you could probably expect to hear from their solicitors. (Those two companies are noted for being particularly litigious). But if you 'borrow' a simple heart-shaped design, signifying 'love', from a personal website, the owner would probably neither know nor care.
Some copyright laws are widely ignored. For example those musicians who 'sample' other musicians' recordings, to create their own works, are in breach of copyright legislation, but it rarely results in any court action. If you rip a CD to MP3, even for your own purposes, you're breaching copyright. If you record a programme off the telly, and keep the recording, you're breaking copyright legislation. (The law allows you to make the recording for 'time shift' purposes but not to keep the recording after watching it).
Official (legal) answer here:
http://www.ipo.gov.uk/types/copy.htm
Chris