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Return to Abstracts of Patents Return to Abstracts of Patents 500-749 Patent Abstracts504. DOMANN, F. (J. Pintsch Kom.-Ges.). [Gas Generator for Lumpy and Powdered Coal.] German Patent 744,970. Nov. 25, 1943 (Cl. 26 a.-5.) Chem. Abs., vol. 39, 1945, p. 2862. DONATH, B. See abs. 660, 661. DONATH, E. See abs. 2658, 2659, 2676. |