James Francis Key was granted the patent for Loose-Leaf Spiral Notebook on January 14, 1941. U.S. Patent No. 2,228,355.
The primary purpose of this invention is to provide a loose-leaf notebook held together by a spiral or coil of wire, including suitable means by which the coil of wire may be held stationary in the normal use of the book but which permit the ready removal of the coil for replacement of the leaves of the book.
