An Example of the Locke Adder First Patent 24 December 1901

An Example of the Locke Adder First Patent 24 December 1901

£250

Circa

1901

Country of manufacture

North America

Categories: Scientific, Calculating

Description

An attractive example of Art Nouveau designed Locke Adder. Invented by Clarence Locke (1865-1945) this is the first patent which was improved by a second in 1905. This was the first American adder to enjoy commercial success. For more information ssee nzeldes.com. In good working order, possibly missing felt cover to base.

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GB Fletcher

Fletcher Wallis

Fletcher Wallis sells objects and books relating to the history of science, medicine and technology Arcade. He publishes books through Vernier Press, including Antique Medicine Chests, and Corkscrew Patents from 1795. He has been dealing for forty eight years.

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