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Patent:US4713009


Patent:US 4713009
Title:Teaching apparatus and method for solving algebraic linear equations
Date:15.12.1987
Place:
Country:USA
Person:Borenson, Henry (1469 Neshaminy Valley Dr., Bensalem, PA
Company:
Internal Links:Lehrmittel
Keywords:
Link to the patent office:
(without guarantee)
 US4713009 (espacenet),  US4713009 (uspto)


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Aus der Patentschrift US4713009