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Die große Enzyklopädie des mechanischen Rechnens

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Patent:US897659


Patent:US 897659
Title:Calculating machine
Date:01.09.1908
Place:Berlin-Schlachtensee und Berlin
Country:USA
Person:Rein, Robert (P)
Company:Ludwig Spitz und Co (P)
Internal Links:Duplexmaschine; Unitas
Keywords:
Link to the patent office:
(without guarantee)
 US897659 (espacenet),  US897659 (uspto)


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US897659A Fig. 1