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US2242344A
|
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Electric resistance element and process of manufacturing same
|
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GB458190A
|
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Improvements in or relating to heating devices particularly for railway carriages
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GB448360A
|
|
Improvements in electric heating resistances and in a process of manufacturing same
|
|
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Process of making electric conductors
|
|
GB406498A
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Improvements in the manufacture of gilled metal tubes particularly for heat exchange apparatus
|
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US1998552A
|
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Manufacture of gilled tubes
|
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DE722235C
|
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Process for the manufacture of finned tubes
|
|
GB390296A
|
|
Improvements in or relating to heat-exchange apparatus such as heating or cooling radiators
|
|
GB394407A
|
|
Improvements relating to heat exchangers such as air heaters or coolers for warming or cooling rooms
|
|
US1989996A
|
|
Heat exchange unit
|
|
US1920313A
|
|
Heat exchange apparatus
|
|
US1915742A
|
|
Heat exchange apparatus
|
|
GB382098A
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Improvements in tubular heat exchange apparatus with corrugated fins
|
|
GB382099A
|
|
Improvements in the construction of tubular heat exchange apparatus with corrugated fins
|
|
GB370780A
|
|
Improvements in or relating to tubular heat exchange apparatus
|
|
DE565323C
|
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Heat exchange element consisting of metallic chambers and tubes
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