Einstruction Corporation

Gtco Calcomp

David Eric Timmons

Dana Gene Doubrava

Mark Edward Plasterer

Brad Eckert

Richard Wiley Prugh

Wesley Jacobs

Stephen T Kaye

An electromagnetic interactive whiteboard system includes a first electronic pen () constructed and arranged to operate at a first frequency (F). At least a second electronic pen () is constructed and arranged to operate at a second frequency (F) that is different from the first frequency. An electromagnetic interactive whiteboard () has a single conductive grid () constructed and arranged to receive electromagnetic signals from the pens due to proximity of the pens to the grid. A circuit () separates the first and second frequencies into their respective X and Y component frequencies when the pens are operating simultaneously. A controller () receives a signal including the separated X and Y component frequencies of each of the first and second pens to detect each pen and to determine an X and Y coordinate position of each pen relative to the grid based on the X and Y component frequencies.

Dual pen interactive whiteboard system

A collaborative input systemincludes a host computer. A displayis associated with the host computer. The host computer includes a processorconfigured for executing an application to provide an imageon the display. At least one electromagnetic digitizeris provided separate from the host computer. The digitizerhas an input surfacedefining a display space that is mapped to coincide with the display, and a pen structureoperatively associated with the input surface such that proximity of the pen structure with respect to the input surface, as a result of a user's input, is detected by the digitizer. A wireless communication link is provided between the host computer and the digitizer such that a user's input can be transmitted from the digitizer, be received by the host computer, and be represented graphically on the display together with the image in real time, thereby permitting the user, associated with the digitizer, to personally provide input to the host computer displaying the image.

Collaborative input system

Growing community of inventors

Dunedin, FL, United States of America

David Eric Timmons