47 U.S. Code § 399a - Use of business or institutional logograms
(a) “Business or institutional logogram” defined
For purposes of this section, the term “business or institutional logogram” means any aural or visual letters or words, or any symbol or sign, which is used for the exclusive purpose of identifying any corporation, company, or other organization, and which is not used for the purpose of promoting the products, services, or facilities of such corporation, company, or other organization.
(b) Permitted uses
Each public television station and each public radio station shall be authorized to broadcast announcements which include the use of any business or institutional logogram and which include a reference to the location of the corporation, company, or other organization involved, except that such announcements may not interrupt regular programming.