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Return to Abstracts of Patents Return to Abstracts of Patents 750-999 Patent Abstracts917. ------. [HANSEL, V.] (Ruhchemie A. G.). [Production of Lubricants.] Swedish Patent 106,009, Dec. 1, 1942; appl. filed July 25, 1941. See French Patent 874,483 (abs. 915). See abs. 830. |