1Thomas Jefferson to Isaac McPherson, 13 August 1813 (Jefferson Papers)
Jefferson, Thomas; Opinions on; patent law [index entry]
2Thomas Jefferson to Isaac McPherson, 18 September 1813 (Jefferson Papers)
Jefferson, Thomas; Opinions on; patent law [index entry]
3Thomas Jefferson to Oliver Evans, 16 January 1814 (Jefferson Papers)
Jefferson, Thomas; Opinions on; patent law [index entry]
4Oliver Evans to Thomas Jefferson, 29 January 1814 (Jefferson Papers)
Jefferson, Thomas; Opinions on; patent law [index entry]
5Thomas Jefferson to Robert Gillespie, 3 August 1814 (Jefferson Papers)
Jefferson, Thomas; Opinions on; patent law [index entry]
6Thomas Jefferson to Thomas Cooper, 25 August 1814 (Jefferson Papers)
Jefferson, Thomas; Opinions on; patent law [index entry]
7Thomas Jefferson to A. D. Saunders, 31 July 1816 (Jefferson Papers)
Jefferson, Thomas; Opinions on; patent law [index entry]
8Thomas Jefferson to John Wharton (1771–1845), 10 July 1818 (Jefferson Papers)
Jefferson, Thomas; Opinions on; patent law [index entry]