This is why it is important for the for the founders of a successful open source project to register the trade mark. See the current issue with the python trade

This is why it is important for the for the founders of a successful open source project to register the trade mark. See the current issue with the python trademark in Europe for another example. It may be possible to still register the trade mark if you can supply evidence that the open source project came first and it could confuse your customers, again see what the python guys are doing in there case.