The patent law was created in order to protect intellectual properties that a person made. (It could be arts, scientific inventions, or even tangible designs)
If another person who do not held the patent try to produce the intellectual properties, that person will be tried in court and most likely be forced to compensate the patent holder.
Because of this, smart inventors who are able to produce useful things but do not have enough capital to compete in the market can be encouraged to join the competition.
In the Americas, most African slaves were sold to work on plantations.
Answer:
Expanded federal power at the expensive of the states
Both considered the Soviet Union a threat to freedom. Still Roosevelt was willing to work with Stalin. Stalin in turn supported the establishment of the United Nations. In Truman’s case, he saw a need to increase the role of the United States in policing the world from the threat posed by Communism.