MiniGhost writes "Well... the USPTO is at it again! A recent search of their online patent database reveals a new patent issued on Nov 26, 2002. Apparently cisco has been issued patent #6,487,666, titled 'Intrusion detection signature analysis using regular expressions and logical operators.' So now they are claiming patent rights on the use of regular expressions and logical operators for IDS usage. It's only a matter of time before some corporation patents the stick man now!!"