Grant Inventions Co. v. Grant Oil Burner Corp.

In 1925 complainant assigned to defendant application No. 738433 for United States letters patent relating to pumping units for oil burners used in house heating. Other applications and one patent, No. 1481573, were also assigned, but they are of no consequence in these suits. The defendant agreed to pay complainant royalties based on the number of burners manufactured by it "under the letters patent No. 1481573 or under the letters patent which may be granted upon the applications for letters patent hereinbefore referred to." Complainant contends that defendant was thereby required to pay…