Please note: The public domain status of this work is only in regards to its copyright status. See WP:PD#Fonts or Wikipedia:Restricted materials for more information. Copyright Office Practices (Third Edition), § 313 (pages 67-84)), and thus the image is considered to be in the public domain.
These are not eligible for copyright alone in the United States because they are not original enough or otherwise ineligible (see the Compendium of U.S. This image is ineligible for copyright and therefore is in the public domain in the United States because it consists entirely of typefaces, individual words, handwriting, slogans, simple geometric shapes, etc.