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Curta Patents

Last Update: January 22, 2015 -- THE CURTA REFERENCE


Australian patents


(thanks to Andries de Man)

Austrian patents


(thanks to Jürgen Müller)

Belgium Patents



Canadian Patents



Swiss Patents


(thanks Andreas Buja)

German Patents



Great Britan Patents



Sweedish Patents



US Patents


Patents by Kurt Herzstark's principal engineer Mr. Elmar Maier

Elmar is inventor of a kind of electrically driven CURTA. Thanks to Roland Riemer - 10/17/2010

Canadian Patents

Swiss Patents

German Patents

French Patents

US Patents


The Calculator Reference by Rick Furr (rfurr@vcalc.net)
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