G09F 2019/221

On tunnel walls for underground trains

Official title: {on tunnel walls for underground trains}

G09F2019/221 (On tunnel walls for underground trains) appears on 21 US grants and 26 published applications in this corpus.

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Granted patents
21
Published applications
26
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16
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48
Latest grant
8 Nov 2022

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G09F 2019/221: granted patents and published applications per publication year
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