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Machine A device, a product, a physical thing. Under U.S. law, one of the statutory classes of inventions.MPEP 2105, MPEP 2106, MPEP 2114. maintenance The patent fees due at 4, 8 and 12 years needed to keep a U. S. utility or plant patent in force for its full life. Maintenance Fee See Fee, Maintenance. maintenance fees fees for maintaining in force a patent based on an application filed on or after December 12, 1980 --see MPEP 2500 for more Manual of Patent Examining Procedure (MPEP) A document that contains a description of the practices and procedures of the USPTO. Manufacture One of the classes of patentable subject matter under U.S. law. MPEP 2105. Markush Claim See Claim, Markush. Markush Group In a claim, a finite group from which an element is selected. See Claim, Markush. materials transfer agreement An agreement that provides the understanding that the materials are made available only for scientific work. Means for Claim A patent claim that recites an element as a means for accomplishing a particular function. MPEP 2181. Means Plus Function Language See Means for Claim. Means-Plus-Function Claim See Means for Claim. metes and bounds The legal description of the exact property which is covered by a patent (the Claims). method the course of action or technique followed in conducting a specific analysis or comparison leading to an analytical result. Misuse Using a patent right inappropriately, for example, for forcing a license to purchase a prodict that is not covered by the claims of the patent. Mode, Best See Best Mode. model See Exhibit. Multiple Dependent Claim a dependent claim which further limits and refers back in the alternative to more than one preceding independent or dependent claim.