INDUSTRIAL PROPERTY.
Rights to industrial, literary, and artistic property are reestablished. Special war measures of the powers are ratified, and the right reserved to impose conditions on the use of German patents and copyrights in the public interest. Except as between the United States and Germany prewar licenses and rights to sue for infringements committed during the war are canceled.
SECTION XI.
AERIAL NAVIGATION.
Aircraft of Allied and Associated Powers shall have full liberty of passage, etc., and equal treatment with German planes in German territory and with most-favored-nation planes as to commercial traffic. Germany agrees to accept Allied certificates of airworthiness, competency, etc., and to apply the convention relative to aerial navigation concluded between the powers to her own aircraft over her own territory.
SECTION XII.
TRANSIT, PORTS, WATERWAYS.
Germany shall grant freedom of transit through her territories by mail or water to persons, goods, from or to any of the Allied and Associated Powers without customs or restrictions. The powers shall have equal rights with her own nationals in her ports and waterways.
Free zones existing in German ports on August 1, 1914, must be maintained with due facilities as to warehouses, etc., without charge except for use and administration.
The Elbe from the junction of the Ultava, the Ultava from Prague, the Oder from Oppa, the Niemen from Grodno, and the Danube from Ulm are declared international together with their connections, and will be placed under international commissions.