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Priority to ES0247952ApriorityCriticalpatent/ES247952A1/en
Publication of ES247952A1publicationCriticalpatent/ES247952A1/en
Improvements in the construction of filters for liquids essentially characterized by the fact that their filtering elements are constituted by thin plates or sheets of plastic or synthetic material rectangular or square and completely covered by bags of filter paper or by canvas or metal fabrics when of filtering with infusoria land as filtering material. (Machine-translation by Google Translate, not legally binding)
ES0247952A1959-03-161959-03-16Improvements in the construction of filters for liquids (Machine-translation by Google Translate, not legally binding)
ExpiredES247952A1
(en)