Some research I did on the matter from USPTO sources and our own USDOCs library here at Univ.of Georgia suggests that (sm) is in fact (TM) or ™. The (sm) is not even recognized as an abbreviation and a call to a local patent attorney indicated that (...) (24 years ago, 19-Jul-01, to lugnet.events, lugnet.org.us.lugola)
(...) communication (...) We have absolutely no plans to trademark the logo we used in 2001. The only thing we are considering is the word "Brickfest". KL (24 years ago, 19-Jul-01, to lugnet.events, lugnet.org.us.lugola)