Abstract: A voice-controlled electronic device that includes a device housing having a longitudinal axis bisecting opposing top and bottom surfaces and a side surface extending between the top and bottom surfaces. The device can further include one or more microphones disposed within the device housing and distributed radially around the longitudinal axis; a processor configured to execute computer instructions stored in a computer-readable memory for interacting with a user and processing voice commands received by the one or more microphones and first transducer and second transducers configured to generate sound waves within different frequency ranges.

Abstract: A grinding mill liner, characterized by a sinusoidal shape to promote certain types of grinding. In one embodiment, the mill liner shape defines sinusoidal lifters with low face angles whereby impact grinding can be minimized, and attrition grinding can be maximized. In a further embodiment, the inner liner surface shape defines sinusoidal lifters with high face angles whereby impact grinding can be increased, and attrition grinding can be decreased.

Abstract: A multipurpose folding tool, for use by picnickers and travelers, including a corkscrew, a crown cap remover, and a can opener, as well as a small fork and a small butter knife. Both the corkscrew and a brace for use together with it fit close to the handles of the tool when the tool is in a compact, folded configuration. A spring in one handle keeps the corkscrew safely folded when not in use, and a spring on the brace keeps it in a desired position relative to the handles. The tool also includes folding pliers and may include folding screwdrivers, knife blades, and scissors.