Week ending November 29 1884. PROPERTY IN PATENTS. WIRE CUTTING. A New Process for Toughening Steel. The Patent Office Surplus. Criminal Plumbing., scientific american, 1884-11-29
Week ending November 29 1884. PROPERTY IN PATENTS. WIRE CUTTING. A New Process for Toughening Steel. The Patent Office Surplus. Criminal Plumbing., scientific american, 1884-11-29
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