Patent ID: 7431527

Claim:
A writing instrument, comprising: an elongated barrel having opposite first and second ends; a writing element located at the first end; and an electronic body mass index calculator located within a housing positioned at the barrel second end, wherein the housing comprises opposite front and rear generally rectangular faces, opposite first and second generally rectangular sides, and a generally rectangular end portion, wherein the body mass index calculator comprises: a display viewable through the housing front face; a processor configured to prompt a user to enter weight and height data, and configured to calculate and display, via the display, a body mass index number in response to user entry of weight and height data; and a user control operably connected with the processor and that extends from the housing front face adjacent the display, wherein the user control allows a user to input weight and height data into the processor after a prompt by the processor, and wherein the user control comprises an input wheel rotatably mounted to the writing instrument that is configured to generate input signals to the processor when rotated and/or pushed.