KIRKPATRICK, District Judge.
This is a suit for the infringement of letters patent No. 2,228,602 issued to the plaintiff. The patent is for improvements in a boiler to be used in a hot water heating system. The device consists of an outer and an inner jacket, the space between the jackets being filled with water. The interior of the inner jacket is so arranged as to form a space for the fire box and a tortuous flue passage. The flue passage lies between a number of...
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