A writing system that includes a reusable notebook including a sheet having a working surface. The working surface includes a printed code including an operative control. The writing system includes a writing instrument configured to capture images of the printed code and a computing device configured to communicate with the reusable notebook and/or the writing instrument. The sheet includes a porous surface located in the working surface. A writing material of the writing instrument comprises solid particles having a particle size greater than a porosity of the porous surface.

A writing instrument, comprising a tubular body having a longitudinal axis with a first and a second end, and with an opening arranged in the first end; a first building block having a body part with a substantially plane surface and one or more coupling knobs extending from the substantially plane surface, and where the first building block is fixed onto the outside of the tubular body so that the coupling knobs extend away from said longitudinal axis.

A writing instrument, comprising a tubular body having a longitudinal axis with a first and a second end, and with an opening arranged in the first end; a first building block having a body part with a substantially plane surface and one or more coupling knobs extending from the substantially plane surface, and where the first building block is fixed onto the outside of the tubular body so that the coupling knobs extend away from said longitudinal axis.

An electronic device, including a housing that is metal or lined with an electrically conductive material, at least one electrical component, and a battery cell positioned in a cavity in the outer housing, the battery cell integrated into the electronic device. The battery cell includes a first current collector and an active cell core. The first current collector is the electrically conductive material of the outer housing of the electronic device and connects to the at least one electrical component. The active cell core includes a first active material in adjacent facing relation to and electrically coupled to the first current collector, a second active material; a separator positioned between the first active material and the second active material; and a second current collector electrically coupled with the second active material, wherein the second current collector connects to the at least one electrical component.

An electronic device, including a housing that is metal or lined with an electrically conductive material, at least one electrical component, and a battery cell positioned in a cavity in the outer housing, the battery cell integrated into the electronic device. The battery cell includes a first current collector and an active cell core. The first current collector is the electrically conductive material of the outer housing of the electronic device and connects to the at least one electrical component. The active cell core includes a first active material in adjacent facing relation to and electrically coupled to the first current collector, a second active material; a separator positioned between the first active material and the second active material; and a second current collector electrically coupled with the second active material, wherein the second current collector connects to the at least one electrical component.

The present invention relates to a scratching device and in particular to a scratching device having an integrated light. The scratching device is a tool having a first end and a second end. A stylus and a retractable writing element can be at the first end of the tool. A scraper is at the second end of the tool. The scraper has first and second sides that can converge to form an edge. The scraper has an interior that encases a light. The light is diffused through the scraper, wherein the edge is illuminated. The first side of the scraper can be concave, and the second side can be convex.

A tourniquet windlass device is provided with a writing functionality. The device may be designed such that it may be used with an improvised constricting band such as a necktie or other fabric.

A tourniquet windlass device is provided with a writing functionality. The device may be designed such that it may be used with an improvised constricting band such as a necktie or other fabric.

A writing and underline-drawing implement includes: an elongate hollow body having an open top portion and a closed bottom portion; an elongate core received in the elongate hollow body, the elongate core having the tip portion; a cap having a tip hole partially formed in a top portion thereof, the cap being hollow and having an open bottom portion to partially receive and/or passed through by the elongate core, the cap being configured to at least partially move along a length of the elongate hollow body; and rotatable guide wheels coupled to the cap at an upper portion of the cap, the cap being disposed between the guide wheels.

A writing and underline-drawing implement includes: an elongate hollow body having an open top portion and a closed bottom portion; an elongate core received in the elongate hollow body, the elongate core having the tip portion; a cap having a tip hole partially formed in a top portion thereof, the cap being hollow and having an open bottom portion to partially receive and/or passed through by the elongate core, the cap being configured to at least partially move along a length of the elongate hollow body; and rotatable guide wheels coupled to the cap at an upper portion of the cap, the cap being disposed between the guide wheels.