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Patent:US2724554


Patent:US 2724554
Title:Accounting machine interlocks
Date:22.11.1955
Place:Birmingham, MI und Dayton
Country:USA
Person:Helgeson, Angus G. (P)
Company:NCR (P)
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Keywords:
Link to the patent office:
(without guarantee)
 US2724554 (espacenet),  US2724554 (uspto)


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