Legal Opinion
Chicago Pneumatic Tool Co. v. Hughes Tool Co.
Court of Appeals for the Tenth Circuit
Decided July 1, 1938No. 1623PublishedCited by 36 opinions
1Opinion of the Court
BRATTON, Circuit Judge.
Hughes Tool Company instituted this action against Chicago Pneumatic Tool Company to restrain alleged infringement of letters patent Number 1,647,753, issued November 1, 1927, relating to conical cutters usejd in rotary drills in drilling wells for oil and gas. Floyd. L. Scott and Louis H. Wellenseik were the inventors, and plaintiff acquired the patent from them by assignment. The trial court held claims 2, 3, 4, and 5 valid and infringed.
The .mechanism long in use in rotary drilling is a bit, head secured at the lower end of the drill stem. Mated conical cutters are…
2Cases cited9 opinions
- Eibel Process Co. v. Minnesota & Ontario Paper Co.Supreme Court of the United States · 1923
- Continental Paper Bag Co. v. Eastern Paper Bag Co.Supreme Court of the United States · 1908
- Sanitary Refrigerator Co. v. WintersSupreme Court of the United States · 1929
- Tilghman v. ProctorSupreme Court of the United States · 1881
- Skinner Bros. Belting Co. v. Oil Well Improvements Co.Court of Appeals for the Tenth Circuit · 1931
4 more not listed; retrieve them via the Exa API.
3Cited by36 opinions
- Autogiro Company of America v. The United StatesUnited States Court of Claims · 1967
- Georgia-Pacific Corporation v. United States Plywood CorporationCourt of Appeals for the Second Circuit · 1958
- Harry A. Pursche v. Atlas Scraper and Engineering Co., a Corporation, Atlas Scraper and Engineering Co., a Corporation v. Harry A. PurscheCourt of Appeals for the Ninth Circuit · 1962
- McCullough Tool Co. v. Well Surveys, Inc.Court of Appeals for the Tenth Circuit · 1965
- The Garrett Corporation v. The United StatesUnited States Court of Claims · 1970
31 more not listed; retrieve them via the Exa API.