The record first. Granted August 23, 2022 on a 2021-priority filing, US11424639B2, "Wireless charging coil and electronic device including the same" (CPC H02J 50/10 and H01F 27/2804), assigned to Samsung Electronics. Named inventors include Juhyang Lee and Yusu Kim. The claim covers the coil geometry and how it sits in the device — the physical enabler of wireless charging.
Follow the segment line. Wireless charging is not just a convenience feature; it anchors an accessory ecosystem. Charging pads, certified cases, and aligned-coil mounts are high-margin accessories, and the standard a phone supports determines which accessories sell. Owning the coil IP lets the handset maker shape that ecosystem and capture more of its margin.
The business framing is the accessory tax. Every certified accessory carries a margin the platform owner shares in, and proprietary or patent-fenced charging keeps third parties from undercutting that margin. The coil grant is a brick in the wall around the accessory revenue the handset enables.
Comparability discipline applies. "Wireless charging" spans inductive, resonant, and proprietary fast-wireless approaches with different accessory implications. The filing pins this claim to a specific coil design — useful for tracking which maker owns which charging approach, and a distinction the spec sheet flattens.
What the document does not disclose is the economics. It is a coil-and-device claim, not an accessory P&L. It will not tell you accessory attach, margin, or certification revenue. The grant establishes a defensible position; the accessory dollars are undisclosed.
For investors, the throughline is this: wireless charging is an accessory-ecosystem story, and the patent record shows which makers are fencing the margin that ecosystem generates.