From WikiChip
Template:PD-logo

Public domain This image or logo only consists of typefaces, individual words, slogans, or simple geometric shapes. These are not eligible for copyright alone because they are not original enough, and thus the logo is considered to be in the public domain.
Please note: The public domain status of this work is only in regards to its copyright status. There may be other intellectual property restrictions protecting this image, such as trademarks or design patents if it is a logo.
threshold of originality