Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Individual
Original Assignee
Individual
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Publication date
Application filed by IndividualfiledCriticalIndividual
Priority to ES73533ApriorityCriticalpatent/ES73533A2/en
Publication of ES73533A2publicationCriticalpatent/ES73533A2/en
ES73533A1920-04-301920-04-30
An internal hearth boiler with a bundle of water tubes arranged in the flame tube, behind the hearth bridge.
ExpiredES73533A2
(en)