Detection of seizure and stroke

Devices, systems, and techniques are described for detecting stroke or seizure with a compact system. For example, a system includes a memory, a plurality of electrodes, and sensing circuitry configured to sense, via at least two electrodes of the plurality of electrodes, electrical signals from a patient, and generate, based on the electrical signals, physiological information. The system may also include processing circuitry configured to receive, from the sensing circuitry, the physiological information, determine, based on the physiological information, a seizure metric indicative of a seizure status of the patient and a stroke metric indicative of a stroke status of the patient, and store the seizure metric and the stroke metric in the memory. A housing may carry the plurality of electrodes and contain both of the sensing circuitry and the processing circuitry.

The abstract as published by the patent office, from US2022061743A1. It describes the invention; it is not a statement of what is protected.

• Interface and electrodes

  Electrodes and arrays

• Signal processing

  Signal processing

• Decoding

  Neural decoding

What the filing appears to be about, read by published rules from its title, abstract and classification codes (A61B2560/02, A61B5/0006, A61B5/0031, A61B5/165, A61B5/28). 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.

Signal processing

A decoder is only as good as the features it is given, and recordings drift and pick up noise from movement, muscle and stimulation. The problem behind it: stable features from signals that change from day to day, computed fast enough to act on.

Decoding

This is the step that turns brain activity into a command or a word. Its accuracy and speed are what a user experiences. The problem behind it: accuracy that holds over months without frequent recalibration, for more than one user and one task.

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 5 times in 4 offices. Each publication opens in Espacenet.

• United StatesUS2022061743A13 Mar 2022
• International (PCT)a route to several countries, not a countryWO2022047218A13 Mar 2022
• ChinaCN115988989A18 Apr 2023CN115988989B14 Apr 2026 · grant
• European Patent Officea route to several countries, not a countryEP4203769A15 Jul 2023

1. 28 Aug 2020First filingEarliest priority, at United States. The family is counted in this year.
2. 27 Aug 2021ApplicationsFiled at United States, International (PCT), China, European Patent Office.
3. 27 Aug 2021Owner recordedUnited States, on US2022061743A1: assignment; owner named: MEDTRONIC, INC., MINNESOTA.
4. 3 Mar 2022First publicationUS2022061743A1, United States.
5. 5 Jun 2024Office recordEuropean Patent Office, on EP4203769A1: application withdrawn.
6. 14 Apr 2026Grant publishedCN115988989B, China.

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

Medtronic · 40 families identified

Use case

CognitiveNeuromodulation

• 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: US2022061743A1 in Espacenet
• Counted as a BCI patent family: classified A61B5/293 (invasive electrodes for brain recording); filed by Medtronic, Inc., an organisation already in the graph; cites a family already accepted. How families are found and judged