Useful
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USEFUL. That which may be put into beneficial practice.
2. The patent act of congress of July 4, 1836, sect. 6, in describing
the subjects of patents, mentions "new and useful art," and "new and useful
improvement." To entitle the inventor to a patent, his invention must, to a
certain extent, be beneficial to the community, and not be for an unlawful
object, or frivolous, or insignificant. 1 Mason, 182; 1 Pet. C. C. R. 322; 1
Bald. 303; 14 Pick. 217; Paine, 203.
A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.