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Individual
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Priority to ES66993ApriorityCriticalpatent/ES66993A3/es
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ES66993A1918-05-061918-05-06El producto industrial lámparas eléctricas de pequeñas dimensiones, propias para juguetes y otros usos.
ExpiredES66993A3
(es)
Un procedimiento industrial consistente en el aprovechamiento de las masas depuradas de la fabricación del gas del alumbrado, para su tratamiento químico.