| HYDRAID 0330935 · TMA174733 | CALGON CORPORATION | 1 Chemicals | Registered | 1971 |
| HydroTiles 2230498 · TMA1255133 | an individual | 19 Building | Registered | 2024 |
| HYDRATERRA 2213998 · TMA1243208 | Profile Products LLC | 1 Chemicals | Registered | 2024 |
| HydroTrim 2206088 · TMA1231871 | an individual | 5 Pharmaceuticals | Registered | 2024 |
| HydroDerm 2195697 · TMA1256396 | HydroDerm Manufacturing Inc. | 10 Medical | Registered | 2024 |
| HYDROTEC 2164252 · TMA1220525 · design | General Motors LLC | 9 Electronics | Registered | 2024 |
| HYDROTEC 2164251 · TMA1220524 | General Motors LLC | 9 Electronics | Registered | 2024 |
| HYDROTEC 2164250 · TMA1220523 · design | General Motors LLC | 7 Machines | Registered | 2024 |
| HYDROTEC 2164249 · TMA1220522 | General Motors LLC | 7 Machines | Registered | 2024 |
| Hydritic 2152468 · TMA1193906 | Iconthin Biotech Corp | 11 Lighting | Registered | 2023 |
| HATHERWOOD 2124013 · TMA1179457 | LIDL STIFTUNG & CO. KG | 5 Pharmaceuticals29 Meat30 Coffee+3 | Registered | 2023 |
| HYDROTECH 2061583 · TMA1277146 | Winston Products, LLC | 6 Metal17 Rubber20 Furniture+2 | Registered | 2024 |
| HYDROTRUE 2041470 · TMA1136619 | RESEARCH PRODUCTS CORPORATION | 11 Lighting | Registered | 2022 |
| HydroToM 2026384 · TMA1275232 | CENTRE INTERDISCIPLINAIRE DE DÉVELOPPEMENT EN CARTOGRAPHIE DES OCÉANS (CIDCO) | 9 Electronics | Registered | 2024 |
| HYDRATI 1964504 · TMA1149842 | Delta Faucet Company | 11 Lighting | Registered | 2022 |
| HOTROD 1924871 · TMA1101001 | Parsons Xtreme Golf, LLC | 28 Toys | Registered | 2021 |
| HYDRATREK 1856582 · TMA1019921 · design | HYDRATREK IP, LLC | 12 Vehicles | Registered | 2019 |
| HYDROTITE 1840144 · TMA1113373 | C.I. TAKIRON CORPORATION | 17 Rubber19 Building | Registered | 2021 |
| HYDROTEC 1803293 · TMA1056254 | General Motors LLC | 9 Electronics | Registered | 2019 |
| HYDROTEC 1803289 · TMA1056243 · design | General Motors LLC | 9 Electronics | Registered | 2019 |
| HYDROTIKA 1744033 · TMA962327 | Rotoplast 2000 inc. | 9 Electronics17 Rubber19 Building+4 | Registered | 2017 |
| HYDRAHYDE 1678204 · TMA985196 | Wells Lamont LLC | 21 Housewares25 Clothing | Registered | 2017 |
| Hydradermal 1667786 · TMA901865 | COSMÉTIQUES FRANCE-LAURE (1970) INC. | 3 Cosmetics | Registered | 2015 |
| HYDROTURF 1651070 · TMA950972 | Watershed Geosynthetics LLC, Corporation organized pursuant to the laws of the State of Georgia, U.S.A | 27 Carpets | Registered | 2016 |
| HYDROTURF 1651047 · TMA950964 · design | Watershed Geosynthetics LLC, Corporation organized pursuant to the laws of the State of Georgia, U.S.A | 27 Carpets | Registered | 2016 |