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ES296726A2
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Improvements in the construction of guillotine windows (Machine-translation by Google Translate, not legally binding)
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ES291997A1
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Improvements in the construction of guillotine windows (Machine-translation by Google Translate, not legally binding)
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ES286798A1
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Improvements in guillotine window guiding and folding devices (Machine-translation by Google Translate, not legally binding)
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ES252565A1
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Improvements introduced in guillotine windows (Machine-translation by Google Translate, not legally binding)
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ES232465A1
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Improvements in the construction of fines based on wooden cords with metal heavy soul (Machine-translation by Google Translate, not legally binding)
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ES204642A1
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Some improvements in the construction of forged floors and ceilings of buildings. (Machine-translation by Google Translate, not legally binding)
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