US Patent 7946774 Folding keyboard with numeric keypad

A folding keyboard is set forth with a numeric keypad, and one fold line located between the edge of a standard continuous space bar and the edge of the numeric keypad. Preferably, the keyboard further includes left and right top cases, supporting inexpensive rubber dome switches, left and right bottom cases, membrane sheets with circuit traces connecting keyboard electronics to contact points under each key, two hinge screws or rivets (or the like) that hold the left and right sides of the keyboard together at the hinges, and a locking mechanism to keep the case closed when folded shut.