15 U.S.C. § 1093
The certificates of registration for marks registered on the supplemental register shall be conspicuously different from certificates issued for marks registered on the principal register.
(July 5, 1946, ch. 540, title II, § 25, 60 Stat. 436.)
Repeal of inconsistent provisions, effect of this chapter on pending proceedings and existing registrations and rights under prior acts, see notes set out under section 1051 of this title.