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5 résultats pour : first u.s. patent

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The first steam engine designed and built in the United States, by Oliver Evans, of Philadelphia, Pa., 1801 (printed/published ca. 1893)
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The first steam engine designed and built in the U...

Copy of first patent ca. 1905
UMG22A19_119

Copy of first patent ca. 1905

Patent Office employee pointing to copies of first patent granted after 1836 when patent laws were rewritten circa 1940.
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Patent Office employee pointing to copies of first...

Machine-gun Battery
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Machine-gun Battery

Clara Barton
UMG20A12_196

Clara Barton