Matches in DBpedia 2015-10 for { ?s ?p "A piano with an aluminum piano plate, called the Alumatone plate, was created in the late 1940s by Winter and Company, piano manufacturers, and Alcoa, a manufacturer of aluminum and aluminum products. The metal frame of a piano, often called the plate or harp, anchors both ends of the strings, withstanding a tension of 20 tons or more. The first completely metal frames were patented in the mid-1820s, and they are now generally cast in iron."@en }
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- Aluminum_piano_plate comment "A piano with an aluminum piano plate, called the Alumatone plate, was created in the late 1940s by Winter and Company, piano manufacturers, and Alcoa, a manufacturer of aluminum and aluminum products. The metal frame of a piano, often called the plate or harp, anchors both ends of the strings, withstanding a tension of 20 tons or more. The first completely metal frames were patented in the mid-1820s, and they are now generally cast in iron.".