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Individual
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Individual
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Priority to ES92786ApriorityCriticalpatent/ES92786A2/en
Publication of ES92786A2publicationCriticalpatent/ES92786A2/en
ES92786A1925-02-281925-02-28
Improvement in the speakers of the talking machines, loudspeakers of wireless telephony and other similar devices.
ExpiredES92786A2
(en)