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Individual
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Individual
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Priority to ES447742ApriorityCriticalpatent/ES447742A1/es
Publication of ES447742A1publicationCriticalpatent/ES447742A1/es
ES447742A1976-05-081976-05-08Soporte para fijacion de bobina de electroiman con nucleo derecuperacion, anexionada a figuras de plastico.
ExpiredES447742A1
(es)
Electronic chess practising board for training purposes - has board with indicating, and punched strip information feed facility for teaching and practising the game of chess or shogi