Memorial of the Lehigh Zinc Company in reference to a bill r
Memorial of the Lehigh Zinc Company in reference to a bill reviving the expired patent of Samuel T. Jones, upon petition of his administratrix, Martha M. Jones, passed by the House of Representatives
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"On July 23d, 1850, Samuel T. Jones obtained an English patent for improvement in method of making white oxide of zinc, which patent expired July 23d, 1864."
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