US Patent 11297941 Portable collapsible variable height book stand

A book stand having three interconnected sections that is adjustable between a closed state where it is portable, and an open state, the open state being one of a number of heights, which height is selectable by the user to account for users of different sizes and users that are standing or sitting when using a book placed on the book stand. The middle section has a strut containing notches on both sides, one side for receiving a stem connected to the top section, the other side for receiving a stem from the bottom section, so that the user may adjust the height of the book stand for use on a surface for when the user wants to stand or sit down. Such book stands are useful for religious studies, particularly as a shtender.