Writing from New York, Carnegie discusses a conversation a with Mr. Andrews about "the right to use the patents for own business." Carnegie refers to Judge Ewing's decision in the Schoenberger case in the postscript

April 7, 1892

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Writing from New York, Carnegie discusses a conversation a with Mr. Andrews about "the right to use the patents for own business." Carnegie refers to Judge Ewing's decision in the Schoenberger case in the postscript