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Individual
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Individual
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Priority to ES152521ApriorityCriticalpatent/ES152521A1/en
Publication of ES152521A1publicationCriticalpatent/ES152521A1/en
ES152521A1941-04-211941-04-21
IMPROVEMENTS IN THE ROTATING SYSTEMS OF ELEMENTS BALANCED BY FLOATS, ESPECIALLY IN PROPELLERS FOR AERODINOS
ExpiredES152521A1
(en)