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File:Ljungström Regenerative Heat Transmission Apparatus.jpg

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Summary

Description
English: Fredrik Ljungströms patent drawings for the "Regenerative Heat Transmission Apparatus". Application filed at USPTO november 27, 1925. Patent granted Februari 11, 1930.
Date
Source USPTO Patent no. 1746598, issued 1930
Author Fredrik Ljungström (1925)
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11 February 1930

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current09:20, 2 November 2009Thumbnail for version as of 09:20, 2 November 20092,793 × 2,395 (558 KB)Lidingo{{Information |Description={{en|1=Fredrik Ljungströms patent drawings for the "Regenerative Heat Transmission Apparatus". Application filed at USPTO november 27, 1925. Patent granted Februari 11, 1930. }} |Source=USPTO Patent no. 1746598,

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