Besides designs with similar inspiration, a number of unofficial releases and digitisations of Bembo have been made in the phototypesetting and digital periods, reflecting the lack of effective intellectual property protection for typefaces. Several unofficial versions were released during the phototypesetting period under alternate names; for example one unofficial phototypesetting version was named "Biretta" after the hat worn by Roman Catholic clergy, and another by Erhard Kaiser was created for the East German printing concern Typoart, outside the reach of Western intellectual property laws. In the digital period, Rubicon created a version named "Bentley" intended for small sizes and Bitstream made a version under the name of "Aldine 401". Its licensee ParaType later created a set of Cyrillic characters for this in 2008. The name "Bembo" remains a Monotype trademark and may not be used to describe such clones.