Abstract: A pulse detection device including a substrate configured to be attached to a subject, the detection device including components for detecting a pulse and/or that couple monitoring of a heartrate, using photoplethysmography, with detection of a physical pulse force using a pressure sensor.

Abstract: A modular case for a mobile device is formed by providing a hard shell layer within a soft overmold layer. The soft overmold layer preferably lines both an inner and an outer surface of the hard shell layer so as to both protect the mobile device from scratches and to distribute any impact forces to the case across the surface of the soft overmold layer. The hard shell layer generally has multiple sets of injection mold ports so that when the soft overmold layer is formed over the hard shell layer, the soft overmold layer threads through the injection ports, providing an interlocking union of the two layers.