U.S. Patent Specifications

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.)