|
|
Return to Abstracts of Patents Return to Abstracts of Patents 250-499 Patent Abstracts471. DEMAG, A. G. [Catalyst Chamber.] German Patent 685,319, no date. Schmidt, J., Das Kohlenoxyd. Akad. Verlagsgesell., Leipzig, 1950. p. 161. DE MARCHI, V. S. See abs. 1794. |