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Die große Enzyklopädie des mechanischen Rechnens

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Patent:IT304676


Patent:IT 304676
Title:Dispositivo per la facile lettura dei bastoncini di Neper
Date:02.01.1932
Place:Pescia (PT)
Country:Italy
Person:Marchi, Pierluigi ; Trapanesi, Luigi
Company:
Internal Links:
Keywords:Napier bones
Link to the patent office:
(without guarantee)
 IT304676


Compact cylindrical device using Napier bones to multiply a 4 digits number