Index of patents issued from the United States Patent Office
![Cover of Index of patents issued from the United States Patent Office Cover of Index of patents issued from the United States Patent Office](https://library.si.edu/sites/default/files/styles/book_cover_medium/public/books/covers/indexofpatentsis1950unit_cover_0.jpg?itok=NgH7H4Kp)
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Publisher:
U.S. Govt. Print. Off.; For sale by the Supt. of Docs., U.S. Govt. Print Off
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Subject(s): History and Culture; Natural and Physical Sciences | |
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