If it is not on the internet it doesn t exist Seriously though being web based is not a measure of non notability What s needed is a measure of how broadly something is used on the web or not If the symbol is just identified by a single person enterprise on a series of closely related websites which may be the case it isn t notable If a number of independent groups use it it s a different story Basically can someone come up with at least two usages that is not a A website maintained by Per Bylund or b a wikipedia mirror