In trademark law you accumulate rights by virtue of use - with or without registration. When G.ho.st applied for a registration recently, it was applying to register legal rights in the trademark NO WALLS which G.ho.st had already accumulated by public use of the trademark NO WALLS since April 2007, 17 months before Microsoft first used it.
Clearly Microsoft have no right to use the same trademark (or minor variations) as a much smaller competitor, and even though we are much smaller we will do our best to protect our intellectual property rights and not get bullied.
Zvi Schreiber
CEO, G.ho.st