Capacitive shield for charger artifact reduction for implants

A set of shielded coils for wireless power transmission into a medical implant is described in which the external, power transmission coil is blocked at least on one side by a shield with a broken ring and radial fingers while the power receiver coil inside the medical implant is surrounded by a shield having a broken ring connecting radial fingers and ribs around its circumference. The finger and rib configurations minimizes eddy currents in the shields. A ground plane of the implant's internal circuitry, which is within the shield along with the receiver coil, can cap off the cupped receiver shield to form a Faraday cage with it. The metal or other conductive shielding prevents large electric fields from the coils from penetrating into the tissue of the subject while simultaneously allowing magnetic fields inductively couple the coils for charging. An implant with sensitive electrodes that measure minute voltages from a brain or other tissues is protected from capacitively driven voltage swings or other transients during charging.

The abstract as published by the patent office, from US2023198316A1. It describes the invention; it is not a statement of what is protected.

• Interface and electrodes

  Electrodes and arrays

• Packaging

  Packaging and hermeticity

• Power

  Wireless power

• Telemetry

  Wireless telemetry

• Signal processing

  Signal processing

What the filing appears to be about, read by published rules from its title, abstract and classification codes (A61B5/293, A61B5/4064, A61N1/0531, A61N1/0539, A61N1/3718). The claims define what a patent protects, and they are not read here.

Interface and electrodes

Everything downstream works with what the contacts pick up. Their number, size and distance from the neurons set the ceiling on the signal. The problem behind it: more contacts, closer to neurons, that still record after years in tissue that reacts to them.

Packaging

Body fluid destroys unprotected electronics. An implant meant to last has to stay sealed for years while passing every channel through its wall. The problem behind it: a seal that lasts as long as the patient needs it, at a size that leaves room for the channels.

Power

A wire through the skin is a standing infection risk, and a battery sets how long a device runs and how large it is. The problem behind it: enough power through the skin without heating it, and without a connector that breaks the skin.

Why the layer matters to the field, not a judgement of this filing. A patent family shows that protection was sought. It does not show that the technology was built, is used in a product, or works in people. The whole stack

One invention, published 2 times in 1 office. Each publication opens in Espacenet.

• United StatesUS2023198316A122 Jun 2023US12142950B212 Nov 2024 · grant

1. 16 Dec 2021First filingEarliest priority, at United States. The family is counted in this year.
2. 16 Dec 2021Owner recordedUnited States, on US2023198316A1: assignment; owner named: NEURALINK CORP., CALIFORNIA.
3. 22 Jun 2023First publicationUS2023198316A1, United States.
4. 12 Nov 2024Grant publishedUS12142950B2, United States.

Dates as the offices published them. Office records are in the offices' own words and are a selection: refusals, lapses and withdrawals, and records that name an owner. Each concerns one member of the family, not the family as a whole, and another member in the same office may stand. Whether a patent is in force today is not assessed.

Organisation

Neuralink · 31 families identified

• Bibliographic data, family members and office records: European Patent Office, Open Patent Services (the DOCDB and INPADOC databases), read 7 Oct 2026.
• The record itself, with its claims and description: US2023198316A1 in Espacenet
• Counted as a BCI patent family: classified A61B5/293 (invasive electrodes for brain recording); filed by Neuralink Corp, an organisation already in the graph; describes neural hardware or methods without naming the field. How families are found and judged