| HYDRANT 2007626 · TMA1119114 | HYDRANT, INC. | 5 Pharmaceuticals32 Beer | Registered | 2022 |
| HYDRANET 1990790 | Layfield Group Ltd. | 19 Building | Pending | 2019 |
| HYDRAN 0517180 · TMA297609 | Owner not shown | 9 Electronics | Registered | 1984 |
| HYDRAMINT 1815834 · TMA1015106 | COLGATE-PALMOLIVE CANADA INC. | 3 Cosmetics | Registered | 2019 |
| HYDRAMINT 1496197 · TMA861208 | Intercontinental Great Brands LLC | 30 Coffee | Registered | 2013 |
| HYDRANATE 0860806 · TMA501471 | BAUSCH & LOMB INCORPORATED | 5 Pharmaceuticals | Registered | 1998 |
| HYDREANE 1333824 · TMA727581 | an individual | 3 Cosmetics | Registered | 2008 |
| HYDRANCE 0698811 · TMA412653 | an individual | 3 Cosmetics5 Pharmaceuticals | Registered | 1993 |
| HYDRANAL 0516693 · TMA301506 | Sigma-Aldrich Laborchemikalien GmbH | 1 Chemicals | Registered | 1985 |
| HYDRANTULA 2302047 · design | Owner not listed | 19 Building | Pending | 2023 |
| HADRON 2181160 · TMA1230213 | KOHLER CO. | 20 Furniture | Registered | 2024 |
| Hydron 2063354 · TMA1197548 | Parador GmbH | 19 Building27 Carpets | Registered | 2023 |
| HYDRAIN 2002154 · TMA1132667 | Owner not shown | 25 Clothing | Registered | 2022 |
| HEDRINE 1888633 · TMA1171743 | CENTRE NATIONAL HOSPITALIER D'INFORMATION SUR LE MÉDICAMENT-CNHIM | 9 Electronics38 Telecommunications44 Medical | Registered | 2023 |
| HADRIAN 1831887 · TMA1101650 | Fastbrick IP Pty Ltd, a legal entity | 1 Chemicals7 Machines9 Electronics+1 | Registered | 2021 |
| Hydrain 1693723 · TMA964498 | Hydrain Ltd. | 6 Metal19 Building | Registered | 2017 |
| HITRANZ 1533620 · TMA826530 | Emblemtek Solutions Group Inc. | 9 Electronics16 Paper | Registered | 2012 |
| HOTRON 1412156 · TMA773226 · design | Kabushiki Kaisha Hotron, also trading as Hotron Co., Ltd. | 9 Electronics | Registered | 2010 |
| HEDRIN 1319045 · TMA743875 | Thornton & Ross Limited | 5 Pharmaceuticals | Registered | 2009 |
| HADRIAN 1188688 · TMA624101 | Hadrian Solutions ULC | 20 Furniture36 Finance38 Telecommunications+2 | Registered | 2004 |
| HYDRON 0421949 · TMA235344 | CooperVision International Limited | 9 Electronics11 Lighting | Registered | 1979 |
| HYDRIN 0314966 · TMA167938 | an individual | 1 Chemicals | Registered | 1970 |
| HADRIAN 2219621 · design | an individual | 9 Electronics35 Advertising41 Education+2 | Pending | 2022 |
| HEDRON 2163457 | Halliburton Energy Services, Inc. | 7 Machines | Pending | 2022 |
| HYDRON 2132625 | Hydron Energy Inc. | 35 Advertising37 Construction40 Treatment+2 | Pending | 2021 |