Patent US Colloidal mill Google Patents
Dec. 24, 1940. H. PLAUSON 2,225,797 '' COLLOIDAL MILL Filed Dec. 14, 195B 2 SheetsSheet 1 5y J dig Afgarney Patented Dec. 24, 1940 UNITED STATES PATENT OFFICE Application December 14, 1938; Serial N0.''245,683 In ...