Patent:US2569508

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Patent:US 2569508
Title:Key-Operated Calculator
Date:02.10.1951
Place:
Country:USA
Person:Webb, Christopher Frederick (P)
Company:Plus adder, Bell Punch (P) Company, UK
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US2569508 (http://v3.espacenet.com/textdoc?DB=EPODOC&F=0&IDX=US2569508) (espacenet),  US2569508 (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=2569508.PN.&OS=PN/2569508&RS=PN/2569508) (uspto)


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