The AFL owns the word 'Bombers' as a trademark in several classes of goods/services, but only in relation to matters connected with Australian Football.
http://pericles.ipaustralia.gov.au/...sp=D&p_detail=DETAILED&p_rec_no=4&p_rec_all=8
http://pericles.ipaustralia.gov.au/...sp=D&p_detail=DETAILED&p_rec_no=4&p_rec_all=8