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In Criminal Law, an agreement between two or more people to act jointly for an unlawful purpose; a conspiracy. In patent law, the joining together of several separate inventions to produce a new invention.

An illegal combination in restraint of trade, defined under the Sherman Anti-Trust Act, is one in which the conspirators agree expressly or impliedly to use devices such as price-fixing agreements to eliminate competition in a certain locality, e.g., when a group of furniture manufacturers refuse to deliver goods to stores that sell their goods for under a certain price.

In patent law a combination is distinguishable from an aggregation in that it is a joint operation of elements that produces a new result as opposed to a mere grouping together of old elements. This is important in determining whether or not something is patentable, since no valid patent can extend to an aggregation.

COMBINATION. A union of different things. A patent may be taken out for a new combination of existing machinery, or machines. See 2 Mason, 112; and Composition of matter.
     2. By combination is understood, in a bad sense, a union of men for the purpose of violating the law.

References in periodicals archive ?
Sun, Upper bounds for the rainbow connection number of line graphs, Graphs & Combin. (28) 2012, 251-263.
Lih, Structure properties and edge choosability of planar graphs without 6-cycles, Combin. Probab.
Miller, On d-antimagic labelings of prisms, Ars Combin.,72, 65-76 (2004).
Pikhurko, Results and open problems on minimum saturated hypergraphs, Ars Combin. 72 (2004), 111-127.
Combin. 12 (2005) research paper R9; 54 pages (electronic).
Combin. Theory, Series A 115, Issue 5, (2008), 693-725.
Mathematics of Ramsey Theory, Springer, Berlin, Alorithms and Combin. 5 (1990), 34-45.
Combin., 16(2, Special volume in honor of Anders Bjorner):Research Paper 9, 24, 2009.
finds the combinatorial structure to reconstruct or generalize classical mathematics, or combines different mathematical sciences and establishes a new enveloping theory on topological graphs for hold the reality of things F.