McCallum v. Pittsburgh & Cleveland Coal Co.
Court of Appeals for the Sixth Circuit
Appeal from the District Court of the United States for the Southern District of Ohio; John E. Sater, Judge. Suit by William A. McCallum against the Pittsburgh & Cleveland Coal Company. From a decree of dismissal, complainant appeals.
1Opinion of the Court
KNAPPEN, Circuit Judge.
Suit for infringement of United States patent to McCallum, No. 934,562, September 21, 1909, on suspending device for trolley wires. 'This appeal is from a final decree dismissing the bill for noninfringement.
[1] The device of the patent consists of duplicate clamping ears (for holding the trolley wire); their upper parts being tapered in the form of a cone frustum, the ears being normally held together by a conical compression- cup seated upon and embracing the external surface of the tapered ear-extensions. A cylindrical suspending stem, whose upper end is externally…
2Cases cited5 opinions
- McClain v. OrtmayerSupreme Court of the United States · 1891
- Cimiotti Unhairing Co. v. American Fur Refining Co.Supreme Court of the United States · 1905
- Railroad Supply Co. v. Elyria Iron & Steel Co.Supreme Court of the United States · 1917
- Ohmer Fare Register Co. v. OhmerCourt of Appeals for the Sixth Circuit · 1916
- Grand Rapids Show Case Co. v. BakerCourt of Appeals for the Sixth Circuit · 1914
3Cited by6 opinions
- Lakewood Engineering Co. v. SteinCourt of Appeals for the Sixth Circuit · 1925
- Detroit Ry. & Harbor Terminals v. FergusonCourt of Appeals for the Sixth Circuit · 1930
- Fowler v. Detroit Bedding Co.Court of Appeals for the Sixth Circuit · 1931
- Commercial Shearing & Stamping Co. v. Youngstown Steel Car Corp.Court of Appeals for the Sixth Circuit · 1937
- Diamond Mfg. Co. v. Dallas Brass &. Copper Co.Court of Appeals for the Sixth Circuit · 1924
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