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Individual
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Individual
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Priority to ES218530ApriorityCriticalpatent/ES218530A1/en
Publication of ES218530A1publicationCriticalpatent/ES218530A1/en
Sound emitter by air pressure, essentially characterized by being constituted by a mechanism of control regulation, consisting of a housing of metal, hard plastic, bakelite, monomers or any kind of suitable material, which preferably adopts the appearance of two cylinders that they are cut perpendicularly, one of them horizontal, in which is lodged the regulation mechanism of air intake and control, and another vertical, which communicates with the emitting mechanism which is coupled. (Machine-translation by Google Translate, not legally binding)
ES218530A1954-11-191954-11-19Pressure air pressure emitter (Machine-translation by Google Translate, not legally binding)
ExpiredES218530A1
(en)