<span>Patent number 795,525, filed October 22, 1903 and awarded July 25, 1905, by Carl Linde detailing in writing and diagram his Apparatus for Producing Pure Nitrogen </span><span>and Pure Oxygen. Linde noted as assignor of one third of patent to Charles F. Brush, Sr.Charles F. Brush, Sr., PapersSeries 4: Litigation (1883-1906)Box 10Folder 4</span>