Tucker V. Texas, 326 U.S. 517 (1946), In Which A Statute Punishing
Door-to-door Distribution Of Literature Was Held Invalid As An
Abridgment Of Freedom Of The Press.
...Tucker v. Texas, 326 U.S. 517 (1946), in which a statute punishing
door-to-door distribution of literature was held invalid as an
abridgment of freedom of the press.
-- Supreme Court decision quoted by Mike Godwin in comp.org.eff.talk