United States. Congress. Senate. Committee on Patents
Paul Klee
Leonardo da Vinci
Kurt Vonnegut
Émile Durkheim
Sam Youd
King James VI and I
David Macaulay
Washington Irving
Hannah, John
A. E. Fitzgerald
Unknown Author
Canada. Parliament. House of Commons.
Virginia Lee Burton
James P. Womack
Donnell Hunt
United States. Congress. House. Committee on Appropriations
Charles Babbage
Great Britain. Patent Office.
Erik Oberg