PRINCIPLE,
\pɹˈɪnsɪpə͡l], \pɹˈɪnsɪpəl], \p_ɹ_ˈɪ_n_s_ɪ_p_əl]\
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in patent law, the principle of a machine is the particular means of producing a given result by a mechanical contrivance. Parker v. Sliics, 5 McLean, 44, 03, Fed. Cas. No. 10,749. The principle of a machine means the modus operandi, or that which applies, modifies, or combines mechanical powers to produce a certain result; and, so far, a principle, if new in its application to a useful purpose, may be patentable. See Barrett v. Hall, 1 Mason, 470, Fed. Cas. No. 1,047.
By Henry Campbell Black
