Holding that 1–888–M–A–T–T–R–E–S–S “immediately conveys the impressions that a service relating to mattresses is available by calling the telephone number”
Holding applicant's incontestable registration of a service mark for "cash management account" did not automatically entitle applicant to registration of that mark for broader financial services
Holding "[e]vidence of the public's understanding of term," for purposes of establishing if mark is descriptive, "may be obtained from any competent source, including .^.^. dictionaries"