Samsung has launched foldable smartphones that bend into clamshell or book shapes to date. However, its latest patents suggest that these almost-familiar form-factors are to become obsolete quite soon. They hint at new kinds of Galaxy Z Folds and Z Flips with at least 2 hinges each.
https://www.notebookcheck.net/Samsung-s-flagship-phones-might-find-a-whole-new-way-to-fold-soon.508193.0.html