NEW AND USEFUL INVENTION. This phrase is used in the act of congress
relating to granting patents for inventions.
2. The invention to be patented must not only be new, but useful; that
is, useful in contradistinction to frivolous or mischievous inventions. It
is not meant that the invention should in all cases be superior to the modes
now in use for the same purposes. 1 Mason's C. C. R. 182; 1 Mason's C. C. R.
302; 4 Wash. C. C. R. 9: 1 Pet. C, C. R. 480, 481; 1 Paine's C. C. R. 203; 3
Mann. Gr. & Scott, 425. The law as to the usefulness of the invention is the
same in France. Renouard, c. 5, s. 16, n. 1, page 177.
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