United States patent law was established "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;" as provided by the United States Constitution. The American patent system is authorized by Article One, Section 8(8) of the U.S. Constitution which states:
- The 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;
In the U.S., a patent is a right to exclude others from making, using, selling, offering for sale, exporting components to be assembled into an infringing device outside the U.S., importing the product of a patented process practiced outside the U.S., inducing others to infringe, offering a product specially adapted for practice of the patent, and a few other very carefully defined categories. The distinctions between what patent rights include are complex. For example, merely thinking about an invention or drawing a diagram is not an infringement. Likewise, research for "purely philosophical" inquiry is not an infringement. Sometimes, this analysis can be much more sophisticated and difficult: i.e., research directed to commercial purposes may be an infringement—but may not be when the research is directed toward obtaining approval of the Food and Drug Administration for introduction of a generic version of a patented drug.
Under current U.S. law, the term of patent is 20 years from the earliest claimed filing date (which can be extended via Patent Term Adjustment and Patent Term Extension). For applications filed before June 8, 1995, the term is either 17 years from the issue date or 20 years from the earliest claimed domestic priority date, whichever is longer.
Read more about United States Patent Law: Substantive Law, Patents As Property
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