1838: A U.S. patent was issued to John Ericsson for the screw propeller. 1884: The first edition of the Oxford English Dictionary was printed.1903: Sir George Gabriel Stokes, who developed the Stokes' Theorem, died. 1911: Thomas Jennings was found guilty with the first use of fingerprint evidence. 1959: Texas Instruments was issued a patent for the integrated circuit. 1968: Canada's army, air force, and navy were combined into a single Canadian Forces. 1972: The first hand-held scientific calculator (HP-35) hit the market for $395. 1976: German physicist and Nobel Prize winner Werner Heisenberg, famous for his Heisenberg Principle, died. 1981: Donald Wills Douglas, of aircraft design fame, died. 1982: Late Night With David Letterman first aired. 2003: The Columbia Space Shuttle disintegrated over Texas during re-entry.