Actually, that's not true. The official name of the Hugo Award is "Hugo Award" and has been since the mid-1990s when we abandoned the nominal "Science Fiction Achievement Award" name. That name appears one last time in the Constitution as a sop to people who didn't want to face the reality (we couldn't get a service mark registration on SFAA because it was considered two generic), but all of the other references were removed, and the order inverted so that "Science Fiction Achievement Award" is, more or less, a nickname for the Hugo Award.

The Mark Protection Committee does not try to protect SFAA references and it's not in the list of declared service marks.