Dick v. Oil Well Supply Co.
U.S. Circuit Court for the District of Western Pennsylvania
In Equity. Sur demurrer to the bill of complaint.
1Opinion of the CourtAcheson, J.
The cause of demurrer assigned upon the record is that the letters patent sued on are not for any patentable invention; the described improvement in the construction of drilling jars for oil wells being the mere substitution of one material for another. Now it is indeed true that the specification discloses that drilling jars had been made substantially of the form and shape described in the patent, usually of wrought iron alone, or in rare instances entirely of steel; hut such jars, the specification also reveals, were defective—liable to become locked together and inoperative while in the…
2Cited by7 opinions
- American Fibre-Chamois Co. v. Buckskin-Fibre Co.Court of Appeals for the Sixth Circuit · 1896
- Gatch Wire Goods Co. v. W. A. Laid-Law Wire Co.Court of Appeals for the Seventh Circuit · 1939
- General Electric Co. v. CampbellU.S. Circuit Court for the District of New Jersey · 1905
- Hills v. Federal Optical Co.District Court, D. Massachusetts · 1923
- Rose Mfg. Co. v. E. A. Whitehouse Mfg. Co.U.S. Circuit Court for the District of New Jersey · 1911
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