Improvements in vitrified glasses and ceramics of reduced fusion point (Machine-translation by Google Translate, not legally binding)
ES275095A1
Improvements in the alloys of metals very resistant chemically in front of acids and lyps (Machine-translation by Google Translate, not legally binding)
ES233492A1
Accumulator (Machine-translation by Google Translate, not legally binding)
ES209009A1
Improvements in chains or combustión cells (Machine-translation by Google Translate, not legally binding)
