Following his resignation from the federal bench, Duell resumed private practice in New York City from 1906 to 1913, and in 1915. He died on January 29, 1920, in Yonkers, New York.[1]
Personal
Duell was the son of Congressman R. Holland Duell (1824–1891) and Mary L. (Cuyler) Duell (1822–1884).[3] He married Harriet M. Sackett (born 1854), and they had several children, among them State Senator Holland S. Duell (1881–1942).[3]
Everything that can be invented has been invented
Duell has become famous for, during his tenure as United States Commissioner of Patents, purportedly saying "Everything that can be invented has been invented."[4] However, this has been debunked as apocryphal by librarian Samuel Sass[5] who traced the quote back to a 1981 book titled "The Book of Facts and Fallacies" by Chris Morgan and David Langford.[6] In fact, Duell said in 1902:
In my opinion, all previous advances in the various lines of invention will appear totally insignificant when compared with those which the present century will witness. I almost wish that I might live my life over again to see the wonders which are at the threshold.[7]
In that edition, the comedy magazine offered a look at the "coming century." In colloquy, a genius asked "isn't there a clerk who can examine patents?" A boy replied "Quite unnecessary, Sir. Everything that can be invented has been invented."[8]
Another possible origin of this famous statement may actually be found in a report to Congress in 1843 by an earlier Patent Office Commissioner, Henry Ellsworth. In it Ellsworth states, "The advancement of the arts, from year to year, taxes our credulity and seems to presage the arrival of that period when human improvement must end." This quote was apparently then mispresented and attributed to Duell, who held the same office in 1899.[9]