Abstract: A system includes at least a first computing device, at a financial institution, configured to generate a currency request and apply first-level signature(s) to the currency request. A minting request is generated from the currency request and the first-level signature(s). The system also includes at least a second computing device, at a currency management department, configured to apply second-level signature(s) to the minting request to generate a signed minting request. The system also includes a third computing device, at a director's office, configured to apply third-level signature(s) to the signed minting request. The system also includes a plurality of network nodes, implementing a distributed ledger, configured to verify the first-level signature(s), the second-level signature(s), and the third-level signature(s); and mint the digital currency when the first-level signature(s), the second-level signature(s), and the third-level signature(s) are successfully verified.

Abstract: A simulated guitar controller is disclosed that facilitates a player using multiple fingers to strum notes which includes a body portion, a plurality of strum bars disposed on a front face of the body portion, a neck portion extending outwardly away from the body portion, and a plurality of fret buttons disposed on the neck portion.

Abstract: A detachable user input controller having the ability to input control signals into a hand-held electronic device. The controller can be configured to operate similarly to a gun having a trigger and gun-type handle. A mounting connector is formed on the top surface of the gun controller to mount the hand-held electronic device such as a portable electronic game such as a PSP brand or PLAYSTATION PORTABLE brand hand-held electronic game. A releasable collar is provided to secure the game to the controller. The controller includes a three-dimensional motion sensor to detect motion of the controller and generate corresponding signal commands to the game. The controller also provides a number of ergonomically placed buttons allowing further user input corresponding to one or more of the buttons available on the game housing.