English: Exhibit in the Museum für Angewandte Kunst Köln - Cologne, Germany. As a utilitarian object, this work is NOT subject to US copyright laws. Instead, it is covered by a U.S. design patent, which covers the ornamental aspects of utilitarian objects, and lasts fifteen years from the date of grant if filed on or after May 13, 2015 (or fourteen years if filed before May 13, 2015). See Industrial design right. Hence this work is now in the public domain.