To Users, Agents, Importers, Dealers and Manufacturers of Gasolene Automobiles:

United States Letters Patent No. 549,160, granted to George B. Selden, November 5, 1895, controls broadly the commercial forms of gasolene automobiles. ... Both the Basic Selden patent and all other patents owned as aforesaid will be enforced against all infringers.

—1904 advertisement by the Association of Licensed Automobile Manufacturers exhorting compliance with the Selden patent