Wellman v. Midland Steel Co.

BAKER, District Judge.

This is a suit for the infringement of letters patent-No. 421,797, issued to Samuel T. Wellman February 18, '1890. In the specification the patentee says:

“My invention relates to an improved method of charging furnaces, and it consists in the steps hereinafter described and claimed. My improved method is adapted to charge, for instance, the Siemens-Martin or open-hearth furnace for manufacturing steel, or for charging any melting furnace that is charged through doors or openings in the side of the furnace, in contradistinction to blast furnaces, or such as are charged…