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Patent applications and USPTO patent grants for Barrieau; Christopher Mark.The latest application filed is for "qr code proximity testing".
Patent | Date |
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Method and system of granting control access via QR code Grant 11,347,985 - Barrieau May 31, 2 | 2022-05-31 |
Qr Code Proximity Testing App 20210110226 - BARRIEAU; Christopher Mark | 2021-04-15 |
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