Patent:GB349512

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Brevetto:GB 349512
Titolo:Improvements in or relating to punching machines for perforating, and adding the amounts so recorded on, statistical record-cards
Data:26.05.1931
Luogo:
Nazione:Gran Bretagna
Persona:
Ditta:British Tabulating (P) Mach Co Ltd
Link interni:
Keywords:
Link al brevetto:
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 GB349512 (http://v3.espacenet.com/textdoc?DB=EPODOC&F=0&IDX=GB349512)


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Aus der Patentschrift GB349512

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Ultima modifica il 19:56, 3. Feb 2008.