A patent is a legal term that describes an approval by the government, that grants an investor a license for a given time. It is particularly defined as the exclusive privilege to prevent competitors from producing and selling an invention.
Hence, the way in which Thomas Edison hopes to capitalize on his innovations is by having or securing over 1,000 patents for his inventions.
The environmental legislation signed by President Bush in 1990 set stricter standards on pollution from factories. This was done to prevent the negative results of pollution, since everything concerning that was getting worse and worse.
Postwar recovery that imposed harsh standards on the Southern states and supported newly freed slaves (freedmen) in their pursuit of political, economic, and social opportunities.