This one for example: http://www.google.com/patents/US4118163 http://www.google.com/patents/US4118163 I know it won't be a problem when people use this at home

This one for example: http://www.google.com/patents/US4118163 http://www.google.com/patents/US4118163 I know it won't be a problem when people use this at home, but Lulzbot is going to sell assembled versions. I hope they don't get in trouble for that.