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Facts about "Patent-US-1251421.pdf"
Application dateNovember 29, 1915 +
Application number64055 +
Assigned toMaud C. Riesenberg +
Invented byFelix Riesenberg +
Patent dateDecember 25, 1917 +
Patent descriptionSistema di caricamento +
Patent number1251421 +
Patent titleFountain-pen filler +
Patented byUnbranded +
Patented inUS +
Priority dateNovember 29, 1915 +
Used for featureLever filler + and Split lever +