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Individual
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Individual
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Priority to ES0040338UpriorityCriticalpatent/ES40338U/en
Publication of ES40338UpublicationCriticalpatent/ES40338U/en
A double-effect whistle, of the kind comprising two opposing orifices, arranged in parallel planes, characterized essentially by the fact that each of the holes is made in a respective piece molded in plastic material, each piece having a head and a body constituting the whistle by the welding or suitable glue that makes it completely indesmountable. (Machine-translation by Google Translate, not legally binding)
ES0040338U1954-02-091954-02-09A double effect whistle (Machine-translation by Google Translate, not legally binding)
PendingES40338U
(en)