Comptograph Co. v. Mechanical Accountant Co.
Court of Appeals for the First Circuit
Appeal from the Circuit Court of the United States for the District of Rhode Island.
1Opinion of the Court
COLT, Circuit Judge.
This suit was brought for infringement of letters patent No. 465,355, dated December 15, .1891, granted to Dorr E. Eelt, for improvements in computing machines. Computing machines are for performing arithmetical problems mechanically, thereby doing away with the mental operations incident to their performance in the ordinary way. Computing machines of the type of the patent in suit are simply mechanical adding machines.
The alleged infringement is limited to claims 7 and 8 of the patent. These claims cover a single feature of the Felt machine, known as the “subtraction…
2Cases cited13 opinions
- Loom Co. v. HigginsSupreme Court of the United States · 1882
- Potts v. CreagerSupreme Court of the United States · 1895
- Hobbs v. BeachSupreme Court of the United States · 1901
- Krementz v. S. Cottle Co.Supreme Court of the United States · 1893
- Dowagiac Mfg. Co. v. Superior Drill Co.Court of Appeals for the Sixth Circuit · 1902
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3Cited by11 opinions
- Chesapeake & O. Ry. Co. v. Kalten-BachCourt of Appeals for the Fourth Circuit · 1938
- Aluminum Co. of America v. Sperry Products, Inc.Court of Appeals for the Sixth Circuit · 1960
- Stebler v. Riverside Heights Orange Growers' Ass'nCourt of Appeals for the Ninth Circuit · 1913
- Yancey v. EnrightCourt of Appeals for the Fifth Circuit · 1916
- Aluminum Company Of America v. Sperry Products, Inc.Court of Appeals for the Sixth Circuit · 1960
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