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Patent:GB349512


Patent:GB 349512
Title:Improvements in or relating to punching machines for perforating, and adding the amounts so recorded on, statistical record-cards
Date:26.05.1931
Place:
Country:Great Britain
Person:
Company:British Tabulating (P) Mach Co Ltd
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Keywords:
Link to the patent office:
(without guarantee)
 GB349512


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Aus der Patentschrift GB349512