Trademarks operate within a product category. The USPTO lists 8 different categories where "Gutenberg" is currently used as a trademark and a further 13 "dead"

Trademarks operate within a product category. The USPTO lists 8 different categories where "Gutenberg" is currently used as a trademark and a further 13 "dead" categories where it was used historically. If you wanted to use Gutenberg in a different category – e.g. The Gutenberg fruit smoothie maker – you'd probably have no difficulty trademarking the name. http://tmsearch.uspto.gov/bin/showfield?f=toc&state=4810%3A1xkeu.1.1&p_search=searchss&p_L=50&BackReference=&p_plural=yes&p_s_PARA1=&p_tagrepl%7E%3A=PARA1%24LD&expr=PARA1+AND+PARA2&p_s_PARA2=Gutenberg&p_tagrepl%7E%3A=PARA2%24COMB&p_op_ALL=AND&a_default=search&a_search=Submit+Query&a_search=Submit+Query http://tmsearch.uspto.gov/bin/showfield?f=toc&state=4810%3A1...