Abstract: A wearable ring for a human user, the device includes an interior loop of the ring, an exterior loop of the ring surrounding the interior loop, an interior space between the interior loop and the exterior loop. Disposed within the ring are a plurality of sensors arranged within the interior space at predetermined intervals along a circumference of the ring, such that when the exterior loop is moved closer to the interior loop at a particular point along the circumference of the ring through interaction with the exterior loop, a change detected by at least one of the sensors identifies an area near the particular point as an interaction with the ring.

Abstract: There is disclosed a flexible printed circuit board stiffener which includes a body having a top and a bottom, the body comprised of a non-conductive material interspersed with a plurality of conductive elements that traverse the body from the top to the bottom along a vertical axis. The non-conductive material arranged such that electrical current does not move through the body other than in a direction parallel to the vertical axis along the conductive elements with the plurality of conductive elements arranged such that electrical components arranged above the stiffener in contact with the plurality of conductive elements are conductively in connected through the body from the top to the bottom along a plurality of paths parallel to the vertical axis.

Abstract: There is disclosed a wearable device that includes two bands, an exterior band, and an interior band, comprised of an electrically conductive material, and including at least one interior cut through the entirety of the interior band. The two bands form a single-turn coil from the exterior band that may thereafter be used as a receiving coil for inductive charging.

Abstract: A wearable ring for a human user, the device includes an interior loop of the ring, an exterior loop of the ring surrounding the interior loop, an interior space between the interior loop and the exterior loop. Disposed within the ring are a plurality of sensors arranged within the interior space at predetermined intervals along a circumference of the ring, such that when the exterior loop is moved closer to the interior loop at a particular point along the circumference of the ring through interaction with the exterior loop, a change detected by at least one of the sensors identifies an area near the particular point as an interaction with the ring.