United States Patent Office

total 4
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Subject-matter Index of Patents for Inventions
Subject-matter Index of Patents... United States Pate...
37,79
41,99 €
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Proceedings and Addresses
Proceedings and Addresses United States Pate...
90,35
100,39 €
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Celebration of the Beginning of the Second Century of the American Patent System
Celebration of the Beginning of... United States Pate...
90,35
100,39 €
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Primary Sources, Historical Collections
Primary Sources, Historical Coll... United States Pate...
16,82
18,69 €
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