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Patent:US4883277


Patent:US 4883277
Title:Educational board game for teaching mathematics and logic
Date:28.11.1989
Place:9113 W. 69th Ter., Merriam, KS 66204
Country:USA
Person:Laisure, Thomas J.
Company:
Internal Links:Lehrmittel
Keywords:
Link to the patent office:
(without guarantee)
 US4883277 (espacenet),  US4883277 (uspto)


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Aus der Patentschrift US4883277