ES15782A1 - Mejoras en los aparatos destinados a prolongar la duración de la combustión del carbón superior en las lámparas eléctricas de arco.
- Google Patents
Mejoras en los aparatos destinados a prolongar la duración de la combustión del carbón superior en las lámparas eléctricas de arco.
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F Hardtmuth & Ges
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F Hardtmuth & Ges
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Priority to ES15782ApriorityCriticalpatent/ES15782A1/es
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ES15782A1894-04-271894-04-27Mejoras en los aparatos destinados a prolongar la duración de la combustión del carbón superior en las lámparas eléctricas de arco.
ExpiredES15782A1
(es)