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Patent:US1609768


Patent:US 1609768
Title:Overdraft Key Locking Mechanism for Calculating Machines
Date:07.12.1926
Place:
Country:USA
Person:N. W. Perkins
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US1609768 (espacenet),  US1609768 (uspto)


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Aus der Patentschrift US1609768