In March 2007 David Heinemeier Hansson filed three Rails related trademark applications to the USPTO. These applications regard the phrase "RUBY ON RAILS",[7] the word "RAILS"[8] and the official Rails logo.[9] As a consequence, in the summer of 2007 Hansson denied to Apress the permission to use the Rails logo on the cover of a new Rails book written by some authoritative community members. The episode gave rise to a polite protest in the Rails community.[10][11] In response to this criticism, Hansson made the following claims:[12]: I only grant promotional use [of the Rails logo] for products I'm directly involved with. Such as books that I've been part of the development process for or conferences where I have a say in the execution. I would most definitely seek to enforce all the trademarks of Rails.
"RAILS"? have them consider copyrighting "WINDOWS".
Microsoft failed on that one.