Concrete Mixing & Conveying Co. v. R. C. Storrie & Co.

(after stating the facts as above). In the prior art were shown numerous patents involving the use of compressed air for conveying through pipes a wide variety of materials, such as concrete, crude oil, dredge spoil, sand, and water, grain, molten sulphur, etc. As to all prior patente the appellant insists that none is anticipatory of its combination, for that they all lack the salient feature thereof, the arch-breaking nozzle, or anything that could exercise the function thereof.

Of the prior patents we find it necessary to refer particularly to but three, the patent to Smith, No. 122,498, of…