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Patent:US5836587


Patent:US 5836587
Title:Playing cards for an educational game
Date:17.11.1998
Place:3 Roundwood Lane, Harpenden
Country:USA
Person:Druce, Harry Frederick
Company:
Internal Links:Lehrmittel
Keywords:
Link to the patent office:
(without guarantee)
 US5836587 (espacenet),  US5836587 (uspto)


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Aus der Patentschrift US5836587