Patent ID: 7884811

Claim:
A digital writing device comprising: a pen section having a writing portion and a cap engagement portion with a plurality of cap engagement members, the writing portion having an ink distribution device and an optics channel configured to transmit light toward a digitally-enabled writing surface, the cap engagement portion having a camera in optical communication with the optics channel for receiving light from the writing surface through the optics channel; a cap section engageable with the pen section, the cap section having a circuit receiving portion with electronic circuitry for receiving signals from the camera for processing information from the pen section, the cap section further having a pen engagement portion with a plurality of pen engagement members complementarily configured to releasably engage the cap engagement members of the pen section; and a sealing mechanism coupled to at least one of the pen or cap sections and engageable with the other of the pen or cap sections, the sealing mechanism configured to substantially prevent liquids and particulates from entering the cap section, wherein the cap engagement members and the pen engagement members are sealably engageable when the pen section is in a writing configuration and sealably engageable when in a stowed configuration, the writing configuration having the ink distribution device facing away from the circuit receiving portion and the stowed configuration having the ink distribution device facing toward the circuit receiving portion.