Trademarks of the week IBM has obviously finally settled its difficulties with someone who said it owned the E-mark. We don't know if it's true outside the UK, but here the letter E is widely associated with hallucinogenic drug Ecstasy. Earlier this week, IBM managed to file the e-mark in the US and this is what it looks like. But IBM also managed to file a much more puzzling trademark. This is called Ultrium LTO, and Seagate, HP and IBM also seem to have a share in this. This is part of a joint initiative between the three companies to capture the lucrative DLT tape market, several readers have pointed out. LTO stands for Linear Tape Open. The interesting thing about the latter trademark registration is that IBM has registered it, the owner name is Seagate and the last named owner was Hewlett-Packard, in Bracknell. More information about Ultrium LTO can be found here. ®