"Richard Patten was born (probably in Maryland) in 1792 and died in Washington D. C. in 1865.  He is listed in the New York directories as a mathematical instrument maker from 1813 to 1840,  the Washington D. C. directories from 1841 to 1846 and again from 1862 to 1865, and the Baltimore, Maryland directories from 1849 to 1860."

Reference:   Smart, Charles E.  The Makers Of Surveying Instruments In America Since 1700   Troy, New York:  Regal Art Press.  1962