National Dump Car Co. v. Ralston Steel Car Co.
Court of Appeals for the Sixth Circuit
Appeal from the Circuit Court of the United States for the Southern District of Ohio.
1Opinion of the Court
SEVERENS, Circuit Judge.
The questions arising upon this record concern the validity, the scope, if the patent is valid, and the infringement of letters patent originally granted to William A. Caswell, assignor to the National Coal Dump Car Company, dated December 5, 1905, and reissued February 6, 1906. The number of the reissued patent is 12,447, and it professes to be for “a new and useful improvement in cars.” “The invention relates,” says the patentee, “to a class of freight cars having a level floor, provided with trapdoors adapted to be opened to dump their loads, when the latter consist…
2Cases cited19 opinions
- Railway Co. v. SaylesSupreme Court of the United States · 1878
- Morley Sewing MacHine Co. v. LancasterSupreme Court of the United States · 1889
- Solomons v. United StatesSupreme Court of the United States · 1890
- McCormick v. TalcottSupreme Court of the United States · 1858
- Boyd v. Janesville Hay Tool Co.Supreme Court of the United States · 1895
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3Cited by2 opinions
- Freeman v. AltvaterCourt of Appeals for the Eighth Circuit · 1933
- General Electric Co. v. Electric Controller & Mfg. Co.Court of Appeals for the Sixth Circuit · 1917