The New York Times

MORGAN, INVENTOR OF HALFTONE, DIES; His Photo-Engraving Process First Used in the Old Daily Graphic in March, 1880

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Half-tone Engraving: How to Obtain a Patent, Copp & Co. Patent Attorneys, Washington, D.C.

Type Print Medium Halftone engraving in black ink on paper Dimensions Platemark: 14 × 21.7 cm (5 1/2 × 8 9/16 in.) Sheet: 23.8 × 31.6 cm (9 3/8 × 12 7/16 in.) made in USA See more items in Cooper ...