The Science Museum in London, the CNAM in Paris, the Deutches Museum in Munich, and the Arithmeum in Bonn have extensive collections of calculating machines. Further collections are at the Heinz ...
Thomas Strode (1810–1880), a storekeeper and farmer from Coatesville, Chester County, Pennsylvania, was a holder of three patents for calculating devices: US patent №30264 from 1860 for an adding ...
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