Candledragon Inc.

Kiddie-fenwal, Inc.

Digital Ink, Inc.

Arkady Pittel

Andrew M Goldman

Sergey Liberman

Ilya Schiller

Mario A Stein

Garry Shleppi

Vladimir V Subach

Simon Selitsky

Stanislav Elektrov

Ethan A Funk

Leonid Reznik

Illya Schiller

James Salemme

Christopher K Barmore

Motion of a writing instrument is tracked from sensors located in the vicinity. The signals generated from the sensors are processed and used in a wide variety of ways.

Electronic pen holding

An array of sensitive pixel elements is configured to generate signals representative of sensed light that is associated with writing being done by a user, and an optical system concentrates light from a light source across a section of the array of sensitive pixel elements, the signals being useful to compute a subpixel measurement of a position of the light source.

Generating signals representative of sensed light that is associated with writing being done by a user

Electronic stylus

Electronic stylus holder

Tracking motion of a writing instrument

A portable electronic device, a digital camera associated with the portable electronic device, and software configured to run on the portable electronic device and to derive handwriting and control information from hand motion of a writing instrument in the vicinity of the digital camera.

Capturing hand motion

A wireless pen apparatus for producing signals representative of writing by a user, including: a wireless pen; a removable cap on the pen; and, when the cap is removed from the pen and placed at a reference position, communicating wave energy between at least one location on the pen and at least one location on the cap for determining the position of the at least one location on the pen with respect to the reference position of the cap, and for producing signals that depend on the determined position of the at least one location on the pen.

Electronic portable pen apparatus and method

Isolation circuitry for automatically disconnecting a load from a source upon detecting a short and for automatically reconnecting the load to the source after the short circuit clears. The isolation circuitry includes a first node connected to a second node via a first transmission path, and a third node connected to a fourth node via a second transmission path maintained at a different voltage than the first transmission path. There is a switch between the nodes on the first transmission path, and a sensing circuit that is connected between the first and second transmission paths. The sensing circuit includes a current generator that induces a fault indicating current into a load between the first and second transmission paths and monitors the fault indicating current for an increase over a threshold defined by an operating voltage setting circuit when the load impedance falls below a lower limit indicating a short circuit. The sensing circuit provides a control signal to open the switch if a short circuit is detected and to close the switch if a short circuit is not detected.

Isolation circuitry

Growing community of inventors

Brookline, MA, United States of America

Arkady Pittel