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Patent:US2722378


Patent:US 2722378
Title:Means for determining check symbols for symbol groups
Date:01.11.1955
Place:Leiden und Zandvoort
Country:USA
Person:Willem H. T. Helmig Theodorus Reumerman
Company:
Internal Links:
Keywords:
Link to the patent office:
(without guarantee)
 US2722378 (espacenet),  US2722378 (uspto)


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