Battery unit for an electronic price label and an electronic price label, which includes a separate, external, replaceable battery unit having a battery, and a fastening means, which may be detachably fasten the battery unit to the frame part of the electronic price label.

A visual-information security system that includes an information security label positioned to conceal visual information on a substrate. The information security label may include a spiral-shaped cut (or other complex shape) within the body of the label and a pull-tab, such that when a user pulls on the tab, the label peels off of the substrate in a spiral pattern, revealing the information concealed beneath the label. The complex-shaped cut makes reapplication of the label difficult and evident, thus providing security to consumers. The label may include multiple layers of material, for example, a peel-off layer and an adhesive layer.

A physical card (in some cases without any on-board source of power or computing capabilities) is configured to maintain access information for digital bearer assets. A unique identifier visible on the card may be transmitted to a server-system to utilize functionalities corresponding to the card (e.g., based on information associated with the unique identifier) on a decentralized computing platform, like a blockchain-based decentralized computing platform. Private access information, like a secret, private key that corresponds to a public key (e.g., a public-private key-pair) or a representation of the private key (like a ciphertext thereof) and corresponding encryption key, may be physically concealed with tamper-evident components such that a user can readily determine whether the private access information was divulged. In some examples, a user is required to activate one or more tamper-evident features, thereby altering a visible state of the card, to utilize functionalities corresponding to the card.

A display device comprising a first receiving layer and a second receiving layer located onto and in direct planar contact with the first receiving layer; a first support later and a second support layer located onto and in direct planar contact with the first support layer; and a sleeve for receiving the first and second receiving layers and first and second support layers.

The user wearable devices are configured to allow attendees of events to exchange their information upon a simultaneous input into their respective device. The simultaneous inputs initiate a verification that the two users are registered for and present at the same event before initiating a pairing through single direction short range antennas. The simultaneous inputs can also verify whether the two users are facing one another and an appropriate distance apart to coordinate the simultaneous input.

A marking system for marking evidence at a scene is provided including a plurality of markers, and a plurality of different types of holders adapted to secure the plurality of markers in marking environments including a relatively horizontal surface, a relatively vertical surface, a relatively slanted surface, a vehicle surface, and a magnetic surface. The markers may include measurement indicia, a sequential marker identification, an index for indication of orientation, and/or a logo.

A marking system for marking evidence at a scene is provided including a plurality of markers, and a plurality of different types of holders adapted to secure the plurality of markers in marking environments including a relatively horizontal surface, a relatively vertical surface, a relatively slanted surface, a vehicle surface, and a magnetic surface. The markers may include measurement indicia, a sequential marker identification, an index for indication of orientation, and/or a logo.

A Method and Apparatus for Comparing Colors have been disclosed. In one implementation a compliant membrane which is substantially transparent with an area having a shade/color is placed on the user's skin to see what the shade/color will look like on the skin. In one implementation a compliant substrate which is largely transparent with an area having a shade/color is placed on an inanimate object to see how the shade/color will appear on the inanimate object without the substrate itself causing an unnecessary barrier between the inanimate object and the shade/color.

A visual-information security system that includes an information security label positioned to conceal visual information on a substrate. The information security label may include a spiral-shaped cut (or other complex shape) within the body of the label and a pull-tab, such that when a user pulls on the tab, the label peels off of the substrate in a spiral pattern, revealing the information concealed beneath the label. The complex-shaped cut makes reapplication of the label difficult and evident, thus providing security to consumers. The label may include multiple layers of material, for example, a peel-off layer and an adhesive layer.

The user wearable devices are configured to allow attendees of events to exchange their information upon a simultaneous input into their respective device. The simultaneous inputs initiate a verification that the two users are registered for and present at the same event before initiating a pairing through single direction short range antennas. The simultaneous inputs can also verify whether the two users are facing one another and an appropriate distance apart to coordinate the simultaneous input.