The Stylus buzzer design installs a buzzer in the capacitive pen. The pen makes a sound
when it is away from a tablet for a while. This function helps a user to find his or her pen
back. The sound will stop if the button on the pen is clicked. This invention provides the
benefit helping users to find their pen no matter where it is, and manage the risk the pen may go missing
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INC, HP, "STYLUS WITH A BUZZER DESIGN TO NOTICE A USER ON ITS OWN", Technical Disclosure Commons, (July 10, 2018)