A magnetic tape cartridge unit includes a plurality of magnetic tape cartridges stacked in a height direction. Each magnetic tape cartridge includes an antenna coil formed in a substrate, a communication circuit that communicates with a communicatee using power induced by application of a magnetic field from the communicatee to the antenna coil, and a case having a reference plane being a reference in a height direction. The substrate is inclined at an inclination angle of less than 45 degrees with respect to the reference plane. In a case where the plurality of magnetic tape cartridges are stacked in a predetermined orientation in the height direction, the reference planes of the plurality of magnetic tape cartridges are in parallel, and the inclination angles of the substrates relative to the reference planes and positions of the substrates in the reference planes conform among the plurality of magnetic tape cartridges.

Provided are approaches for providing multiple user accounts in a same transaction card assembly. The transaction card assembly may include a first card including a first card first side opposite a first card second side, the first card first side including a first pair of magnetic stripes and the first card second side including a first pair of identification chips. The transaction card assembly may further include a second card coupled to the first card, the second card including a second card first side opposite a second card second side, the second card first side including a second pair of magnetic stripes, and the second card second side including a second pair of identification chips. The first and second cards are slidable relative to one another between multiple positions to selectively expose and cover each identification chip of the first and second pairs of identification chips.

In some examples, a method of manufacturing a densified wood transaction instrument includes boiling a sheet of wood in a chemical solution, compressing the boiled sheet of wood using a die in a press to form one or more features in the sheet of wood, during the compressing of the boiled sheet of wood, heating the boiled sheet of wood to create a sheet of densified wood, and attaching one or more payment elements to at least one of the one or more features formed in the sheet of densified wood to form a sheet of one or more densified wood transaction instruments.

An electronic transaction card communicates with an add-on slot of an intelligent electronic device. The add-on slot may be a memory card slot. The intelligent electronic device may be a mobile phone or other device with or without network connectivity. The electronic transaction card may have magnetic field producing circuitry compatible with magnetic card readers, smartcard circuitry, other point-of-sale interfaces, or any combination thereof.

Provided are transaction cards with a reduced weight core. In some approaches, a transaction card may include a body having a first outer layer opposite a second outer layer, and a corrugated core between the first outer layer and the second outer layer, wherein the corrugated core comprises a plurality of alternating peaks and valleys coupled to the first outer layer and the second outer layer. The transaction card may further include an identification chip positioned through the first outer layer, wherein the identification chip is directly coupled to the corrugated core.

A greeting card stored-value card combinations and methods of forming said combinations are provided. In one embodiment, these combinations include a greeting card comprising means for affixing a stored-value card thereto. These combinations also include a stored-value card affixed to the greeting card. A single identifier, such as a Stock-Keeping Unit (SKU) or a Universal Product Code (UPC), is assigned to the bundle that uniquely identifies the bundled greeting card and stored-value card. The single identifier provides identification means allowing the stored-value card to be activated. A single capture of the single identifier enables the customer to both purchase the greeting card stored-value card combination product as well as to activate the store-value card.

The techniques and systems described herein relate to manufacturing, characterizing, and/or identifying one or more types of magnetic nanowires (MNWs). One or more types of MNWs may be associated with different objects, and a system may identify the objects based on the magnetic nanowires associated with the objects. For example, such techniques may involve characterizing the types of MNWs based on magnetic field transmission characteristics and ferromagnetic resonance characteristics of each type of MNW. In some examples, the techniques described herein may enable the identification of each of a plurality of types of MNWs present in a sample or object based on a combined transmission value of the sample. Such techniques may enable the development and use of barcode-like systems of different types of MNWs for labeling and identifying objects of interest.

The disclosed embodiments provide a payment card. The payment card may have a first face and a second face opposite the first. Additionally, the payment card may comprise a first smart chip, the first smart chip having contacts that are electronically accessible from the first face of the card. The payment card may further comprise a first antenna coupled to the first smart chip, the first antenna providing near-field contactless access to the first smart chip and a second smart chip, the second smart chip having contacts that are electronically accessible from the second face of thecard. Additionally, the payment card may comprise a second antenna coupled to the second smart chip, the second antenna providing near-field contactless access to the second smart chip and an RF block that electronically isolates the first antenna and the second antenna from each other.

The techniques and systems described herein relate to manufacturing, characterizing, and/or identifying one or more types of magnetic nanowires (MNWs). One or more types of MNWs may be associated with different objects, and a system may identify the objects based on the magnetic nanowires associated with the objects. For example, such techniques may involve characterizing the types of MNWs based on magnetic field transmission characteristics and ferromagnetic resonance characteristics of each type of MNW. In some examples, the techniques described herein may enable the identification of each of a plurality of types of MNWs present in a sample or object based on a combined transmission value of the sample. Such techniques may enable the development and use of barcode-like systems of different types of MNWs for labeling and identifying objects of interest.

Logic may detect a malfunctioning payment interface on a customer's payment instrument. Logic may receive transaction data about at least one transaction performed via a payment instrument associated with a customer. The transaction data may indicate a payment interface of the payment instrument through which the customer conducted the at least one transaction and the payment instrument may comprise one or more payment interfaces. Logic may determine, by a model, based on the transaction data, a probability of a malfunction by at least one interface of the one or more payment interfaces. The model may be trained based on a pattern of transactions associated with malfunctioning payment instruments. Logic may compare the probability of the transaction against a threshold. And logic may determine whether to contact a customer associated with the payment instrument, based comparison of the probability of the transaction against the threshold.