Legal Opinion
Edwards v. Johnston Formation Testing Corporation
Court of Appeals for the Fifth Circuit
Decided February 22, 1932No. 6244PublishedCited by 17 opinions
1Opinion of the Court
SIBLEY, Circuit Judge.
Charles R. Edwards," the patentee in United States patent No. 1,514,585, for improvements in a testing device for oil wells, claimed that the device used by Johnston Formation Testing Corporation, and made under Johnston patent No. 1,709,940, infringed the former patent, lost his ease, and appeals. The appellee made a cross-claim of infringement, but abandoned it. The sole questions áre whether the Edwards patent is valid, and, if so, whether the Johnston device infringes it.
From the beginning of oil wells, there has been a problem of getting the oil and gas from the…
2Cases cited2 opinions
- Railway Co. v. SaylesSupreme Court of the United States · 1878
- Kokomo Fence MacHine Co. v. KitselmanSupreme Court of the United States · 1903
3Cited by17 opinions
- Stewart-Warner Corp. v. Lone Star Gas Co.Court of Appeals for the Fifth Circuit · 1952
- Southern States Equipment Corp. v. Usco Power Equipment Corp. Usco Power Equipment Corp. v. Southern States Equipment CorpCourt of Appeals for the Fifth Circuit · 1953
- Industrial Instrument Corporation v. The Foxboro CompanyCourt of Appeals for the Fifth Circuit · 1962
- Freeman v. AltvaterCourt of Appeals for the Eighth Circuit · 1933
- Matthews v. Koolvent Metal Awning Co.Court of Appeals for the Fifth Circuit · 1946
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