Carrying a pen about with you is now perceived as almost as nerdy as wearing a wristwatch or taping the bridge of your spectacles.
Today’s invention is a phone case which allows people to make a brief printed note using only their cellphone.
The phone in its case is placed on a piece of paper.
One of four hemispherical ‘feet’ in the case is equipped with a graphite coating.
A program on the phone drives the onboard eccentric flywheel vibration so that the drawing foot is driven across the paper, creating marks as it goes.
Since writing paper has a pretty consistent coefficient of friction, simple, continuous-line versions of on-screen text or symbols can thus be reproduced.