Introduction to patents. 1947.

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Introduction to patents. 1947.

http://www.worldcat.org/oclc/56163596

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Columbia University in the City of New York, Columbia University Libraries

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SNAC Resource ID: 7733798

Columbia University in the City of New York, Columbia University Libraries

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Leder, William.

http://n2t.net/ark:/99166/w6xw71f2 (person)