| HYDRABULK 1909143 · TMA1085578 | Paragon Tank Truck Equipment, LLC | 7 Machines | Registered | 2020 |
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| HYDROBALL 1666219 · TMA909230 | CENTRE INTERDISCIPLINAIRE DE DÉVELOPPEMENT EN CARTOGRAPHIE DES OCÉANS (CIDCO) | 9 Electronics | Registered | 2015 |
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| HYDRAFALL 1625291 · TMA933249 | Delta Faucet Company | 11 Lighting | Registered | 2016 |
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| HydraBear 1577694 · TMA855130 | Continental Intermodal Group-Trucking LLC | 6 Metal7 Machines9 Electronics+2 | Registered | 2013 |
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| HYDRABOLT 1369791 · TMA811745 | Innovative Mining Products (Pty) Ltd t/a New Concept Mining | 6 Metal | Registered | 2011 |
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| HYDROBELT 1107810 · TMA601084 | Arnold Jäger Holding GmbH | 12 Vehicles28 Toys | Registered | 2004 |
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| HYDRABALM 2340620 | NAKED AND THRIVING INC. | 3 Cosmetics | Pending | 2024 |
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| HYDROBALL 2259781 · design | an individual | 9 Electronics11 Lighting | Pending | 2022 |
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| HYDRABURN 2249567 · TMA1268704 | Owner not listed | 5 Pharmaceuticals | Registered | 2024 |
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| HYDRAPLAY 2229029 · TMA1252870 | BrandCo Elizabeth Arden 2020 LLC | 3 Cosmetics | Registered | 2024 |
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| HYDRABOOTY 2216251 · TMA1245418 | HydraFacial LLC | 44 Medical | Registered | 2024 |
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| HydroBLU 2105097 · TMA1284236 | Güntner GmbH & Co. KG | 7 Machines9 Electronics11 Lighting | Registered | 2025 |
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| HYDROVEDA 2094686 · TMA1219017 | Global Beauty Science Holdings, Inc. | 3 Cosmetics | Registered | 2024 |
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| Hydraplex 2007611 · TMA1108708 | ROLLPACK | 16 Paper | Registered | 2021 |
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| Hydrobe 1950910 · TMA1267674 | Hydrobe Cooperation Inc. | 9 Electronics41 Education | Registered | 2024 |
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| HYDROPEL 1917541 · TMA1101869 | an individual | 19 Building | Registered | 2021 |
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| HYDRAPEAT 1798810 · TMA1051586 | Profile Products LLC | 1 Chemicals | Registered | 2019 |
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| HYDROBLUE 1769194 · TMA1046022 | Owner not shown | 1 Chemicals | Registered | 2019 |
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| HYDRAPOL 1751258 · TMA1003217 | Owner not shown | 7 Machines9 Electronics11 Lighting | Registered | 2018 |
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| HYDROBLUR 1694854 · TMA1031266 | an individual | 3 Cosmetics | Registered | 2019 |
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| HYDROPULL 1580923 · TMA858163 | Tempress Technologies, Inc. | 7 Machines | Registered | 2013 |
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| HYDRABIO 1557734 · TMA870937 | NAOS, Société par actions simplifiée | 3 Cosmetics5 Pharmaceuticals44 Medical | Registered | 2014 |
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| HYDRABOND 1465845 · TMA782868 | Genuine Health Inc. | 3 Cosmetics5 Pharmaceuticals | Registered | 2010 |
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| HYDROFILL 1446800 · TMA828648 | MICROVENTION, INC. (a Delaware corporation) | 10 Medical | Registered | 2012 |
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| HYDRAFEND 1416901 · TMA809670 | Kyowa Hakko Bio Co. Ltd. | 1 Chemicals3 Cosmetics5 Pharmaceuticals | Registered | 2011 |
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