Lourie Implement Co. v. Lenhart

Citations

• 130 F. 122
• 64 C.C.A. 456
• 1904 U.S. App. LEXIS 4146

Syllabus

<p>1. Patents foe Invention — What Additions, Omissions, and Changes of' Form do not Avoid Infringement.</p> <p>One may not escape infringement by adding to or subtracting from a patented device, by changing its form, or by making it more or less efficient, while be retains its principle and its mode of operation, and attains its result by tbe use of the same or of equivalent mechanical means.</p> <p>2. Same.</p> <p>Letters patent No. 415,542, to John Lenhart, secure an adjustable sliding plate, attached by means of a bolt and a slot in the plate to the inner side of the moldboard or share of a plow, to regulate its tilting. Tbe plate described in tbe specification has a thin lower edge turned toward the share, so that as it is depressed it will pass under tbe edge of the share, qnd cut tbe roots of grass under the turf.</p> <p>Reid, an adjustable sliding plate attached by means of a bolt and a slot in tbe plate to tbe inner side of tbe clip on tbe inner side of the moldboard of a plow, to regulate its tilting, is tbe mechanical equivalent of tbe patented device, although its lower edge is flattened in tbe form, of a triangular shoe, so that it will not cut roots, and although it depends by the side of, and not vertically under tbe edge of, the plowshare.</p> <p>(Syllabus by the Court.)</p> <p>1. See Patents, vol. 38, Cent. Dig. §§ 372, 376, 377.</p>