Samuel Hopkins (inventor)

Samuel Hopkins (inventor)

The Birth of American Innovation Samuel Hopkins and the First U S PatentПодробнее

The Birth of American Innovation Samuel Hopkins and the First U S Patent

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Famous People We've Lost in 1889 - Obituary in 1889

Famous People We've Lost in 1891 - Obituary in 1891Подробнее

Famous People We've Lost in 1891 - Obituary in 1891

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Who is Samuel Hopkins (inventor)?

On This Day: July 31, 1790 - Samuel Hopkins and the First US Patent for Potash ProcessПодробнее

On This Day: July 31, 1790 - Samuel Hopkins and the First US Patent for Potash Process

Today's Toast - July 31 - Samuel HopkinsПодробнее

Today's Toast - July 31 - Samuel Hopkins

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