A quick definition of land grant:

A land grant is when the government gives someone or a group of people a piece of land. This can be for different reasons, like settling a new area or as a reward for service. A land patent is a document that proves someone owns the land. A patent is also a type of legal protection for inventors. It gives them the right to be the only ones who can make or sell their invention for a certain amount of time. There are different types of patents, like design patents for how something looks and utility patents for how something works.