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Patent drawing - Patent pierwszego wiecznego pióra z 1884 r. Lewis Edson Waterman. Public domain image

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Polski: Patent pierwszego wiecznego pióra z 1884 r. Lewis Edson Waterman.

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Date

1884
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USPTO
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https://www.uspto.gov/
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label_outline Explore Drawings Of Cross Sections, Technical Drawings, Patent Drawings

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patent drawings drawings of cross sections technical drawings united states patent drawings waterman fountain pens inventions