"A printer´s mark, device, emblem or insignia was a symbol used as a trademark by early printers starting in the 15th century.
The first printer´s mark is found in the 1457 Mainz Psalter by Johann Fust and Peter Schöffer. One of the most well-known old printer´s marks is the dolphin and anchor, first used by the Venetian printer Aldus Manutius as his mark in 1502.
The database Printers´ Devices of the Ancient Book Section of the Library of the University of Barcelona, was launched in October 1998. The University of Florida libraries also provide digital access to printers´ devices and include The University of Chicago devices that have appeared on the cover of their publication The Library Quarterly. " - (en.wikipedia.org 05.10.2020)
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