Opinion ID: 1494427
Heading Depth: 1
Heading Rank: 3

Heading: Paper Patent.

Text: Appellant contends that this patent should be narrowly construed because it is a paper patent. The inference of paper patent is drawn from the non-user of a furnace thermostat extending into the combustion pot, which is the construction shown in the drawings and particularly described in the specifications. The specifications clearly state the purpose of the furnace thermostat and that it is to be operated by the furnace heat. The effect of that heat to operate a thermostat placed near the outlet of the heat from the fire-pot would be quite evident to one skilled in the art. The exact location in the drawings and particular description in the specifications amounted to no more than the expression of a preferred form. If appellee had placed this thermostat, exactly as shown in the drawings, in his commercial device, it would have been no less an infringement for appellant to locate its thermostat in the breeching. If mechanical skill or mere convenience indicated to appellee the placing of the thermostat in the breeching instead of in the fire-pot, it would be within the teaching of the patent and a similar location by appellant would still be an infringement.