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Individual
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Individual
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Priority to ES93727ApriorityCriticalpatent/ES93727A1/en
Publication of ES93727A1publicationCriticalpatent/ES93727A1/en
ES93727A1925-05-141925-05-14
Improvements introduced in the electric ignition systems by spark plugs of internal combustion engines.
ExpiredES93727A1
(en)