United States patent 50617

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U.S. Patent No. 50,617
by Alfred Nobel
  • Apr 16, 1869, U.S. Patent No. 50,617: Improved Substitute for Gunpowder.
  • Mar 19,1872, U.S. Patent No. 50,617: Improved Substitute for Gunpowder.
  • Oct 21, 1873, U.S. Patent No. 50,617: Improved Substitute for Gunpowder.
  • Mar 17, 1874, U.S. Patent No. 50,617: Improved Substitute for Gunpowder.