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Patent:US2971268


Patent:US 2971268
Title:Quiz Game Devices
Date:14.02.1961
Place:
Country:USA
Person:H. Zimmerman
Company:
Internal Links:Lehrmittel
Keywords:
Link to the patent office:
(without guarantee)
 US2971268 (espacenet),  US2971268 (uspto)


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Aus der Patentschrift US2971268