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Patent number 2,474,140. Page 1.

img792.jpg INGERSOLL MIILLING MACHINE COMPANY HISTORY.ThumbnailsPatent number 2,474,140. Sheet 4.INGERSOLL MIILLING MACHINE COMPANY HISTORY.ThumbnailsPatent number 2,474,140. Sheet 4.INGERSOLL MIILLING MACHINE COMPANY HISTORY.ThumbnailsPatent number 2,474,140. Sheet 4.INGERSOLL MIILLING MACHINE COMPANY HISTORY.ThumbnailsPatent number 2,474,140. Sheet 4.