My understanding is that the more generic a trademark is (cough) apple (cough) the more it is tied to a specific industry. This is just a case of bored lawyers at apple. What really sucks is that for apple this is nothing, the lawyers are already payed for who cares if they overstep their authority a bit. but for a small company hit with a bogus trademark dispute this is a major traumatic expensive event.

https://en.wikipedia.org/wiki/Trademark#Limits_and_defenses_...