Stating that "[a]s to strength of a mark . . . [third-party] registration evidence may not be given any weight . . . [because they are] not evidence of what happens in the market place"
Rejecting argument that SQUIRT SQUAD in standard letters is distinct from SQUIRT registered in “distinctive lettering on a dark medallion”; “[b]y presenting its mark merely in a typed drawing, a difference cannot legally be asserted by that party”
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
Holding that "little weight is to be given [to third-party] registrations in evaluating whether there is likelihood of confusion" because "[t]he existence of these registrations is not evidence of what happens in the market place or that customers are familiar with them"