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
Finding that the TTAB did not err in determining that the term was generic, citing in part concerns arising from the methodology of the applicant's consumer survey
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"