SummaryA 3D model of U.S. Pat. No. 1,346,729. Cutting edge 1920 bookmark technology from the original Thingiverse—the U.S. PTO. "To all whom it may concern: Be it known that I, JEAN, J. VANDERVEER, citizen of the United states, residing at Brattleboro, in the county of Windham and State of Vermont, have invented certain new and useful Improvements in Bookmarks; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same."