Patch-based devices for enhancing the local delivery of drugs, pharmaceuticals, plasmids, genes and other agents into the tissues of the living body. The attenuation is obtained through a combination of one or more flow restrictors and added volume chambers fluidly interposed between the degassing chamber and the vacuum pump. A cover closes the opening and comprises an elongated body of a resilient material including an upper region having a passage sized to accommodate the tailgate rod and lower region having a \u201cT\u201d shaped slot intersecting the passage. The captured text phrases and the screen shot images are then combined to provide a context-based translation of the sections. The user program then invokes functions contained in the operating system to convert data in accordance with the stored binary table.