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Walter Max Hahnemann, Berlin‐Marienfelde, and Ernst Kramar, Berlin‐Tempelhof, Germany, assignors to C. Lorenz Aktiengesellschaft, Berlin‐Tempelhof, Germany, a company. Application November 19, 1937. Serial No. 175,429. In Germany May 10, 1933. 5 Claims. (Cl. 250–11.)
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1941
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