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Individual
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Individual
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Priority to ES0257808ApriorityCriticalpatent/ES257808A2/en
Publication of ES257808A2publicationCriticalpatent/ES257808A2/en
Improvements introduced in the object of the main patent number 249440 by safety valve system against gas leaks, consisting of the addition of a check valve in series with the lower chamber to the piston. (Machine-translation by Google Translate, not legally binding)
ES0257808A1960-05-031960-05-03System of valve of safety against gas exhausts (Machine-translation by Google Translate, not legally binding)
ExpiredES257808A2
(en)