Patent ID: 7454977

Claim:
A digital pen, comprising: a body member having a longitudinal direction; a writing force sensor including a substrate arranged at least partially within the body member, wherein the substrate includes at least one pattern of electrically conductive material on a first major surface thereof, wherein the first major surface extends in substantially the longitudinal direction; a writing surface contacting member mounted at least partially within the body member; means for changing a direction or location of application of a force transmitted via the writing surface contacting member in response to contact with a writing surface from a force applied in a first direction or location to a force delivered in a second direction, or location; and means for changing an electrical conductivity property associated with the pattern of electrically conductive material on the substrate based on the force with which the writing surface contacting member contacts the writing surface, wherein the means for changing the electrical conductivity property is responsive to the force delivered in the second direction or location.