Your company brand could be very valuable and may be worth protecting.
Your brand includes names, symbols, strap lines, logos and packaging and failure to protect it could mean that any other company could gain from your hard work, effort and entrepreneurial flair without your permission which can cause damage to your business.
http://www.birkettlong.co.uk/site/library/legalnews/Make_your_mark_to_avoid_legal_woes?