Curta Patents

(since April 22, 1997)

Last Update: August 26, 2021 -- THE CURTA REFERENCE

Australian patents

(thanks to Andries de Man)

Austrian patents

(thanks to Jurgen Muller)

Belgium Patents

Canadian Patents

Swiss Patents

(thanks Andreas Buja)

German Patents

Great Britan Patents

Sweedish Patents

US Patents

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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