[SINGER] H[enry] Brevoort] RENWICK [1817-1895] engineer, born in New York City, 4 September, 1817, was graduated at Columbia in 1836, and became assistant engineer in the United States service. He served as first assistant astronomer of the United States boundary commission in 1840-'2, and in 1848 was appointed examiner in the United States Patent Office. In 1853 he became United States inspector of steamboat engines for the district of New York, and since his retirement from that office he has devoted himself to consultation practice in the specialty of mechanical engineering, in which branch he is accepted as one of the best authorities in the United States. Mr. Renwick was associated with his father in the preparation of "Life of John Jay" (New York, 1841). The Renwick Family papers are in the collection of Columbia College. As a patent expert he took part in nearly all the great patent litigations between 1870 until his death. Among these cases were the sewing machine, the McCormick reaper, and the Bell telephone. ALS, NYC, 1870, 1p, 8vo. To the president of the Singer Sewing Machine Co. about the Johnson Patent.

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