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Elements for the formation of signals, characterized by being made up of a tape in the form of a band with a U-section, which has a reinforcing bead along both sides and also transversely, constituting a closed space, whose tape has one end one notch and the other a perforation, both having said ends only one side bent, so that superimposing the ends of one element on another and joining the notch and hole coincided by means of screws, allows the formation of signs of the most diverse figures. (Machine-translation by Google Translate, not legally binding)
ES78744U1960-02-111960-02-11
Elements for signal formation
ExpiredES78744Y
(en)