Stating that “a laches or estoppel defense in an opposition (or cancellation) proceeding may be based upon the Opposer's failure to object to an Applicant's registration of substantially the same mark ”
15 U.S.C. § 1052 Cited 1,599 times 274 Legal Analyses
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"