The distinction between combinations and aggregations is a well-accepted principle of patent law. A combination is an assemblage of known elements whose combined use leads to a result that is different from the sum of the results of the individual elements. Whereas, an aggregation is an assemblage of elements that each produce their expected result leading to an assemblage that is merely the sum of its parts. Combinations are patentable, while aggregations are not. The patent bargain, which offers an inventor a 20-year monopoly on the claims of their invention in exchange for enabling disclosure, is not offered to aggregations since there is no social benefit in the disclosure of obvious inventions.