Embodiments of the present invention provide an approach for dynamic random access memory SSD-based memory to improve memory usage. The usage key card comprises a storage medium, which is formatted to contain an identification code unique to the usage key card. When the device is positioned within the coronary sinus adjacent the mitral valve annulus and deployed, the coupling structures may be released from each other by the release of the locking member. The marker may be correlated with information including at least one of substrate information about the mask blank glass substrate, thin film information about the mask pattern thin film, and resist film information about the resist film. The generated hydrogen and oxygen gases are maintained in a stable condition in the output gas flow by an electromagnetic coil assembly that separates the hydrogen gas from oxygen gas. The label comprises a non-adherent flap which contains the transponder.