Improvements in the construction of drilling bars. (Machine-translation by Google Translate, not legally binding)
ES297026A1
Improvements in the construction of tools for hazelness and dismantling (Machine-translation by Google Translate, not legally binding)
ES292147A1
Improvements in the construction of tensioning bands for wooden travies for railroad or similar (Machine-translation by Google Translate, not legally binding)
ES263849A1
Improvements in the construction of steel clamps for turning with an interchangeable polygonal cutting plate (Machine-translation by Google Translate, not legally binding)