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Whereas, Levi Newcomb of Boston, Suffolk County
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Whereas, I, George P. Helfrish of Boston in the state of Massachusetts
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Image of the United States Patent Office in Washington, D.C., at the top of a letters patent certificate transferring letters patent for "improvement in plates or dishes" from George P. Helfrish to lithographer Louis Prang; seal with witness signatures below.
priJLC_PRG_002321

Louis Prang. Library shears
Visual Materials
Image of a diagram of a pair of library shears for patent number "104996" invented by Louis Prang; signatures of witnesses, inventor, and patent attorneys Munn & Co. below diagram; letters patent certificate issued to lithographer Louis Prang for improvement in library shears affixed to verso.
priJLC_PRG_004360

Louis Prang. Library shears
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Image of a diagram of a pair of library shears for patent number "104996" invented by Louis Prang; signatures of witnesses, inventor, and seal from patent attorneys Munn & Co. below diagram.
priJLC_PRG_002319

The United States of America : to all to whom these letters patent shall come
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Image of an American bald eagle above the United States Patent Office in Washington, D.C., on a letters patent certificate "No. 55158" issued to lithographer Louis Prang certifying he "invented a new and useful improvement in the manufacture of caustic alkali" dated May 29, 1866; official seal and ribbon at bottom left.
priJLC_PRG_002325

United States patent office. Louis Prang, of Boston, Massachusetts. Letters patent no. 104,996, dated July 5, 1870
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Image of a letters patent certificate issued to lithographer Louis Prang for improvement in library shears, with specification of his invention and detailed descriptions of the various parts of the shears.
priJLC_PRG_002320

In dem im hohen Alter von 85 Jahren in Los Angeles verstorbenen aus Breslau gebürtigen Louis Prang
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Image of a certificate issued October 5, 1909, by a German association ("Zentral Verbandes") in Boston, Massachusetts, expressing their mourning over the death of lithographer Louis Prang, who was born in Breslau (now Wrocław, Poland); five signatures at bottom right.
priJLC_PRG_002326