Patent law in the US is the Patent Act. It protects new inventions and establishes the US Patent Office to accept patent applications. Its authority is from the US Constitution which says "Congress shall have power to promote the progress of science and useful arts, by securing for limited times to authors and inventors the exclusive right to their respective writings and discoveries."
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The first three criteria are generally considered as requirements for identifying a causal effect: (1) empirical association, (2) temporal priority of the indepen- dent variable, and (3) nonspuriousness. You must establish these three to claim a causal relationship.
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