Selox v. Fausek

In re Nat. Data Corp.

Holding that a "likelihood of confusion cannot be predicated on dissection of a mark"

Century 21 Real Estate Corp. v. Century Life of America

Finding similarity between "CENTURY 21" and "CENTURY LIFE OF AMERICA" in part because "consumers must first notice th[e] identical lead word"

Federated Foods v. Fort Howard Paper Co.

Stating that the mere existence of modern supermarket containing wide variety or products should not foreclose further inquiry into the likelihood of confusion arising from the use of similar marks on any goods so displayed

Section 1052 - Trademarks registrable on principal register; concurrent registration

Granting authority to refuse registration to a trademark that so resembles a registered mark "as to be likely, when used on or in connection with the goods of the applicant, to cause confusion, or to cause mistake, or to deceive"