Patent Pending — HEALTH-KEY ULTRA: U.S. App. No. 64/073,334 (May 23, 2026) · HEALTH-BAND Neuro: U.S. App. No. 64/076,078 (May 27, 2026)
EoS Health is an open-hardware, open-firmware wearable health monitoring ecosystem developed by Srikanth Patchava under the Embedded Operating Systems Research Foundation. This mono-repo consolidates all four health devices, the Single Health Hub mobile app, shared firmware, academic publications, patent filings, and the EB-1A evidence portfolio.
Together, these four devices cover ~95% of all clinically relevant health metrics using just hardware you wear or carry.
| Device | Form Factor | Key Capabilities | Patent Status |
|---|---|---|---|
| HEALTH-KEY ULTRA | USB-C pendrive | ECG, SpO₂, BAC breath, HR, temp, UV, IMU, USB-C pass-through | ✅ Patent Pending — 64/073,334 |
| HEALTH-BAND Neuro | Wristband | sEMG gesture control, TENS therapy, BAC breath, ECG, SpO₂, HR | ✅ Patent Pending — 64/076,078 |
| HEALTH-RING | Titanium finger ring | ECG (AFib), SpO₂, HbA1c, cuffless BP, HRV, sleep stages, stress | 📋 Provisional target: 2026 Q3 — EOS-2026-003 |
| HEALTH-LAB | Flexible biosensor patch | Glucose, lactate, cortisol, Na⁺, K⁺, uric acid, pH — 14-day wear | 📋 Provisional target: 2026 Q3 — EOS-2026-004 |
HEALTH-KEY ULTRA ──┐
HEALTH-BAND Neuro ──┤── BLE 5.3 / USB-C ──► Single Health Hub App
HEALTH-RING ───────┤ │
HEALTH-LAB ────────┘ ┌─────────┴──────────┐
│ Digital Twin │
│ AI Food Camera │
│ Doctor Dashboard │
│ Deficiency Alerts │
└────────────────────┘
eos-health/
├── devices/
│ ├── health-key-ultra/ ← HEALTH-KEY ULTRA hardware, firmware, patent, docs
│ │ ├── hardware/ ← PCB (KiCad), CAD, EE schematics, BOM, datasheets
│ │ ├── firmware/ ← nRF52840 firmware source
│ │ ├── patent/ ← USPTO filings, CIP strategy, figures
│ │ ├── academic/ ← journal, white paper, conference paper, thesis
│ │ ├── roadmap/ ← 5-phase product roadmap
│ │ ├── eb1a/ ← EB-1A evidence (cross-reference)
│ │ └── PATENT_STATUS.md ← Official filing status
│ │
│ ├── health-band-neuro/ ← HEALTH-BAND Neuro hardware, firmware, patent, docs
│ │ ├── hardware/ ← Core PCB + Strap FPCB (KiCad), CAD, BOM
│ │ ├── firmware/ ← nRF52840 firmware + TFLite gesture model
│ │ ├── patent/ ← USPTO filings, figures, filing package ZIP
│ │ ├── academic/ ← journal, white paper, conference paper, thesis
│ │ ├── roadmap/ ← 5-phase product roadmap
│ │ ├── eb1a/ ← EB-1A evidence master documents
│ │ └── PATENT_STATUS.md ← Official filing status
│ │
│ ├── health-ring/ ← HEALTH-RING (base + Ultra tiers)
│ │ ├── hardware/ ← Flex PCB (KiCad), BOM, architecture docs
│ │ ├── firmware/ ← nRF52833/nRF52840 ring firmware (eBuild)
│ │ ├── patent/ ← Provisional patent EOS-2026-003
│ │ └── PATENT_STATUS.md ← Filing status + prior art differentiation
│ │
│ └── health-lab/ ← HEALTH-LAB wearable biosensor patch (base + Ultra)
│ ├── hardware/ ← Flex PCB (KiCad), NEBA electrode array, BOM
│ ├── firmware/ ← nRF52833/nRF52840 patch firmware (eBuild)
│ ├── patent/ ← Provisional patent EOS-2026-004
│ └── PATENT_STATUS.md ← Filing status + prior art differentiation
│
├── apps/
│ ├── mobile/ ← Single Health Hub — React Native (iOS + Android)
│ │ ├── src/ ← App source code
│ │ ├── android/ ← Android-specific config
│ │ ├── ios/ ← iOS-specific config
│ │ └── docs/ ← Architecture, BLE GATT profiles, UI design
│ │
│ ├── web/ ← EoS Health web companion app (React + tRPC)
│ └── desktop/ ← Desktop app (future)
│
├── firmware/
│ ├── shared/ ← Shared across all devices
│ │ ├── ble-stack/ ← BLE 5.3 GATT service definitions
│ │ ├── sensor-drivers/ ← MAX30001, MAX30205, LSM6DSO, BME688 drivers
│ │ ├── tflite-runtime/ ← TensorFlow Lite Micro runtime + gesture models
│ │ └── ebuild/ ← eBuild toolchain configuration
│ ├── health-key-ultra/ ← Device-specific firmware config
│ ├── health-band-neuro/ ← Device-specific firmware config
│ ├── health-ring/ ← Device-specific firmware config
│ └── health-lab/ ← Device-specific firmware config
│
├── academic/ ← Shared academic publications
│ ├── journal/ ← IEEE JBHI journal papers
│ ├── white-paper/ ← Technical white papers (Zenodo)
│ ├── conference-paper/ ← IEEE EMBC conference papers
│ ├── thesis/ ← PhD/MS thesis chapters
│ ├── preprint/ ← TechRxiv, arXiv submission guides
│ └── citations/ ← BibTeX, APA, IEEE citation formats
│
├── patent/
│ ├── health-key-ultra/ ← All HEALTH-KEY ULTRA patent documents + receipts
│ └── health-band-neuro/ ← All HEALTH-BAND Neuro patent documents + receipts
│
├── eb1a/ ← EB-1A Extraordinary Ability visa evidence portfolio
│ ├── README.md ← Criteria status table + action plan
│ ├── EB1A_Evidence_Portfolio_Master.md
│ ├── Personal_Statement.md
│ ├── Recommendation_Letter_Templates.md
│ ├── Media_Coverage_and_Press_Release.md
│ └── Peer_Review_and_Judging_Evidence.md
│
├── branding/ ← EoS Health logos, design system, media
├── docs/ ← API docs, developer guide, architecture
└── roadmap/ ← Unified ecosystem roadmap
| Device | Application No. | Filed | Priority Date | Non-Provisional Deadline |
|---|---|---|---|---|
| HEALTH-KEY ULTRA | 64/073,334 | May 23, 2026 | May 23, 2026 | May 23, 2027 |
| HEALTH-BAND Neuro | 64/076,078 | May 27, 2026 | May 27, 2026 | May 27, 2027 |
| HEALTH-RING | EOS-2026-003 | 2026 Q3 (target) | 2026 Q3 | 2027 Q3 |
| HEALTH-LAB | EOS-2026-004 | 2026 Q3 (target) | 2026 Q3 | 2027 Q3 |
All applications filed by Srikanth Patchava (individual inventor) with affiliation to the Embedded Operating Systems Research Foundation. Entity status: Micro Entity.
Both HEALTH-KEY ULTRA and HEALTH-BAND Neuro are built on the same core silicon:
| Component | Part | Role |
|---|---|---|
| MCU + BLE | Nordic nRF52840 | Cortex-M4F @ 64 MHz, BLE 5.3, 1 MB Flash, 256 KB RAM |
| Biometric AFE | Maxim MAX30001 | ECG + BioZ, 18-bit ADC, 512 Hz |
| Optical sensor | Maxim MAX30102 | PPG, SpO₂, HR |
| Temperature | Maxim MAX30205 | ±0.1°C accuracy |
| IMU | ST LSM6DSO | 6-axis, 6.5 µA ODR |
| Gas sensor | Bosch BME688 | VOC, BAC, humidity, pressure |
| Build system | eBuild | EmbeddedOS unified build toolchain |
The mobile app (apps/mobile/) is a single React Native application that connects to all four devices simultaneously over BLE 5.3. It auto-detects which devices are paired and activates the corresponding feature modules.
| Feature | Source Device |
|---|---|
| ECG + arrhythmia detection | HEALTH-KEY ULTRA or HEALTH-BAND Neuro |
| SpO₂ continuous monitoring | Any device |
| BAC breath analysis | HEALTH-KEY ULTRA or HEALTH-BAND Neuro |
| Gesture control (TV, phone, smart home) | HEALTH-BAND Neuro |
| TENS therapy sessions | HEALTH-BAND Neuro |
| Sleep stages + HRV | HEALTH-RING |
| Blood glucose (CGM) | HEALTH-LAB |
| Electrolytes + hydration | HEALTH-LAB |
| AI food camera + nutrition | App (camera) |
| Digital twin health score | All devices combined |
| Doctor dashboard sharing | All devices combined |
# Clone this repo
git clone https://github.com/embeddedos-org/eos-health.git
cd eos-health
# Mobile app
cd apps/mobile && npm install && npx expo start
# Web companion app
cd apps/web && pnpm install && pnpm dev
# Firmware (HEALTH-BAND Neuro)
cd devices/health-band-neuro/firmware
# See firmware/FLASHING_GUIDE.md for J-Link SWD / USB DFU / BLE OTA instructionsAll papers are ready to submit. See academic/ for full documents.
| Platform | Document | Status |
|---|---|---|
| Zenodo (CERN) | White paper + patent spec | ⚡ Submit now |
| TechRxiv (IEEE) | Journal paper | ⚡ Submit now |
| ResearchGate | White paper | ⚡ Submit now |
| Academia.edu | White paper | ⚡ Submit now |
| LinkedIn Article | Press release | ⚡ Publish now |
| Rock Health | Press release | ⚡ Submit now |
The regulatory/ directory contains the complete regulatory compliance package for all four devices across seven frameworks. All documentation is submission-ready; physical testing and formal submissions are the next steps.
| Framework | Documents | Status |
|---|---|---|
| FDA | 510(k) pre-submissions (KEY ULTRA, BAND Neuro); De Novo packages (RING, LAB) | ✅ Documentation complete |
| FCC | Part 15 §15.247 authorization checklist for all 4 BLE devices | ✅ Documentation complete |
| HIPAA | Risk analysis, BAA template, privacy notice, breach response plan | ✅ Documentation complete |
| FTC | Health claim substantiation matrix, required disclaimers, marketing review | ✅ Documentation complete |
| NIST CSF 2.0 | Full GV/ID/PR/DE/RS/RC control mapping, SBOM, FDA 2023 alignment | ✅ Documentation complete |
| ISO 13485 | QMS procedures, risk management, CAPA, design controls | ✅ Documentation complete |
| IEC 60601 | Safety testing checklist (-1, -1-2 EMC, -1-6 usability, -1-11 home, -2-10 TENS) | ✅ Documentation complete |
| Clinical Validation | IRB protocols, ClinicalTrials.gov registration, 10 study SOPs, SAP templates | ✅ Documentation complete |
Estimated total regulatory investment: $1.8M–$4.5M across all 4 devices
Critical path to first commercial sale: 18–24 months (HEALTH-KEY ULTRA via 510(k))
See regulatory/master/MASTER_REGULATORY_SUBMISSION_CHECKLIST.md for the consolidated timeline, cost estimates, and critical path analysis.
The eb1a/ folder contains a complete evidence portfolio for the EB-1A self-petition (Form I-140). See eb1a/README.md for the criteria status table and action plan.
Current status: 4 of 10 criteria met (minimum 3 required)
| Repository | Purpose |
|---|---|
| HealthKey-Ulta | HEALTH-KEY ULTRA — original device repo (patent history preserved) |
| HEALTH-BAND-Neuro | HEALTH-BAND Neuro — original device repo (patent history preserved) |
| eCAD-Hardware-Products | Legacy CAD designs (superseded by health-ring/ and health-lab/ in this repo) |
| embeddedos-org.github.io | Company website |
Hardware designs: CERN Open Hardware Licence v2 Firmware and software: Apache 2.0 Documentation: CC BY 4.0
Srikanth Patchava Founder, Embedded Operating Systems Research Foundation 📧 srikanth.patchava@outlook.com 🌐 embeddedos-org.github.io 🔬 Academia.edu