Helen Augusta Blanchard: Dwadzieścia Osiem Patentów dla Lepszej Maszyny do Szycia
Helen Augusta Blanchard: Twenty-Eight Patents for a Better Sewing Machine
Helen Augusta Blanchard z Portland w stanie Maine złożyła między 1873 a 1915 rokiem dwadzieścia osiem patentów, w tym mechanizm ściegu zygzakowego, który stał się standardem w krawiectwie, ulepszając maszyny poprzez nieustanne przyrostowe doskonalenie zamiast jednego wielkiego wynalazku.
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incremental invention
women inventors
sewing technology
mechanical refinement
patent history
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