This is the frowny emoticon, the logo of Despair, Inc.

Recently, Despair was awarded a trademark today for :-( . They have announced (see they are suing all e-mail users who infringe upon their trademark:

At a press conference, Despair's COO, Dr. E.L.Kersten, announced his intentions to sue "anyone and everyone who uses the so-called 'frowny' emoticon, or our trademarked logo, in their written email correspondence. Ever."

;-)Just in case you don't get over to read the article (a great piece of satire if I do say so myself), although it is true that this is their trademark, the lawsuit announcement on their website is not meant seriously, but as social commentary on intellectual property.