Patent ID: 7280348

Claim:
A pen-based computing system comprising: a tablet unit including a display screen and an electronic assembly housed within an enclosure; and a separate base unit including two panels connected via a hinge, a first one of the panels bearing a keyboard, and a second one of the panels being arcuately displaceable relative to the first panel to prop the tablet unit in a viewing position in which the display screen makes a viewing angle with the keyboard of greater than 90 degrees, wherein the tablet unit and the first panel have complementary formations to prevent sliding movement of the tablet unit relative to the first panel when in the viewing position, wherein the complementary formations include a male formation on the tablet unit shaped and dimensioned to mate with a complementary female formation on the first panel; wherein the first panel includes a plurality of the female formations spaced along a longitudinal axis; and wherein each female formation comprises two sliding members having ends contoured to form a recess to receive the male formation therein in a snug fit, wherein the sliding members are urged toward each other to close the recess.