
USEFUL
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.