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Patent:US1123738


Patent:US 1123738
Title:Cryptographic Attachement for Type Writing Machines
Date:05.01.1915
Place:
Country:USA
Person:E. H. Hebern & F. Hoffman
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US1123738 (espacenet),  US1123738 (uspto)


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Aus der Patentschrift US1123738