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  • patent was on the hopperboy as such, it would be invalidated by any use of a hopperboy operating on the same principle as Evans' hopperboy; and that the trial...
    14 KB (2,020 words) - 02:10, 13 September 2023
  • Evans' improved hopperboy, but sought to show either that the patent only covered the improved method as a whole (and not the hopperboy specifically),...
    11 KB (1,558 words) - 11:14, 4 May 2024
  • defendant Hettich claimed that he did not use Evans' hopperboy, but instead used the earlier Stouffer hopperboy. The trial was presided over by Justice Bushrod...
    9 KB (1,174 words) - 02:10, 13 September 2023