Patent ID: 7009597

Claim:
In a manually guided pointing operation in a display interface between a computer and a manually movable mouse input member positioned by a user, said interface including an intersection between a curved member on said manually movable mouse input member and a mouse pad stationary surface, said interface having associated signal generating circuitry operable to move a cursor in a display in response to relative motion of said curved member with respect to said mouse pad stationary surface, and wherein, said curved member has a peripheral surface in tangential contact with said mouse pad stationary surface, characterized by an improvement, for positioning control of movement of said mouse input member on said mouse pad stationary surface, the addition of a 20–50% increase in weight of said mouse input member, whereby said weight operates to enhance a drag type frictional force component, that resists said movement of said mouse on said mouse pad stationary surface; wherein said 20–50% increase in weight is in the range of 20–50 grams, and wherein said 20–50% weight increase is achieved by means selected from the group consisting of a localized group of metal particles positioned within a housing of said mouse, or a weight member affixed to a housing of said mouse.