Piano Patent Poster, Music Room Decor, Piano Art, Musician Gifts, Piano Blueprint, Piano Wall Art by STANLEYprintHOUSE 0.79 USD This is a vintage patent print. The Piano Patent from 1937. This poster is printed using high quality archival inks, and will be of museum quality. Any of these posters will make a great affordable gift, or tie any room together. Please choose between different sizes and colors. T .. https://www.etsy.com/ca/listing/467939468/piano-patent-poster-music..