Patent Drawing of Engine - Ljungström Regenerative Heat Transmission Apparatus Public domain image

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Patent Drawing of Engine - Ljungström Regenerative Heat Transmission Apparatus Public domain image

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Zusammenfassung

Fredrik Ljungströms patent drawings for the "Regenerative Heat Transmission Apparatus". Application filed at USPTO november 27, 1925. Patent granted Februari 11, 1930.

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Datum

11/02/1930
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http://commons.wikimedia.org/
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