Patent:US1609768

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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 (http://v3.espacenet.com/textdoc?DB=EPODOC&F=0&IDX=US1609768) (espacenet),  US1609768 (http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=/netahtml/FPTO/srchnum.htm&r=1&f=G&l=50&s1=1609768.PN.&OS=PN/1609768&RS=PN/1609768) (uspto)


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