On January 4, 1921, U.S. Patent No. D56,894 issued to Augustus H. Sell on an article of manufacture — a campaign button design for the Warren Harding and Calvin Coolidge:

Augustus filed on July 16,1920, weeks after the June 12, 1920, nomination of Harding and Coolidge at the Republican Convention in Chicago, Illinois, and the patent issued on January 4, 2021, two months after their November 2, 1920, election (but two months before their March 4, 1921, inauguration). However, due to to Harding’s premature death in 1923, the Augustus’ design was useless for the 1924 election.

It is unclear whether Augustus; design was ever used. Campaign buttons from the era were much simpler in design: