INVENTION. A contrivance; a discovery. It is in this sense this word is used in the patent laws of the United States. 17 Pet. 228; S. C. 1 How. U. S. 202. It signifies not something which has been found ready made, but something which, in consequence of art or accident, has been formed; for the invention must relate ot some new or useful art, machine, manufacture, or composition of matter, not before known or used by others. Act of July 4, 1836, 4 Sharsw. continuation of Story's L. U.S. 2506; 1 Mason, R. 302; 4 Wash. C. C. R. 9. Vide Patent. By invention, the civilians understand the finding of some things which had not been lost; they must either have abandoned, or they must have never belonged to any one, as a pearl found on the sea shore. Lec. Elem 350.