# FDA Warning Letter: Neurotris, Inc. dba A1 Engineering
> 2023-11-07 · Center for Devices and Radiological Health · `bc02d5a176e8b44e`
## Letter
- **Company:** Neurotris, Inc. dba A1 Engineering
- **Posted Date:** 2023-11-07
- **Letter Issue Date:** 2023-10-27
- **Issuing Office:** Center for Devices and Radiological Health
## Subject
Medical Device/Adulterated/Misbranded/Lacks PMA and/or 510(k)
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*Source: [FDA Warning Letters](https://www.fda.gov/inspections-compliance-enforcement-and-criminal-investigations/compliance-actions-and-activities/warning-letters) · AI Analytics · CC0 1.0*