| Hydryalix 2031057 · TMA1148931 · design | Allergan Pharmaceuticals International Limited | 5 Pharmaceuticals | Registered | 2022 |
| HYDRALIGHT 1991041 · TMA1223469 | Unilever Canada Inc. | 3 Cosmetics | Registered | 2024 |
| HydraLuxe 1862162 · TMA1014843 | BEAULIEU CANADA LTD. / BEAULIEU CANADA LTEE | 27 Carpets | Registered | 2019 |
| HYDRALAX 1850415 · TMA1080812 | Strides Pharma Canada Inc. | 5 Pharmaceuticals | Registered | 2020 |
| HYDRALIANE 1748138 · TMA1005629 | an individual | 3 Cosmetics | Registered | 2018 |
| HYDRALUXE 1736951 · TMA958674 | Comfort Revolution, LLC | 20 Furniture | Registered | 2016 |
| HYDRALUXE 1700891 · TMA982186 | Owner not shown | 9 Electronics | Registered | 2017 |
| HYDRALUX 1123162 · TMA600199 | KaMin LLC | 2 Paints | Registered | 2004 |
| HYDRALICIOUS 1352718 · TMA743007 | The Procter & Gamble Company | 3 Cosmetics | Registered | 2009 |
| HydraLytica 1974857 · TMA1128229 | dynaCERT Inc. | 38 Telecommunications | Registered | 2022 |
| HydraLytica 1991582 | dynaCERT Inc. | 9 Electronics36 Finance37 Construction+2 | Pending | 2019 |
| HYDROLIQ 2136716 · TMA1236974 | an individual | 1 Chemicals5 Pharmaceuticals37 Construction+1 | Registered | 2024 |
| HYDRALEAF 2061751 · TMA1277151 · design | Hydraleaf Corporation | 5 Pharmaceuticals29 Meat30 Coffee+3 | Registered | 2024 |
| HYDRALEAF 2061743 · TMA1277149 | Hydraleaf Corporation | 5 Pharmaceuticals29 Meat30 Coffee+3 | Registered | 2024 |
| HYDROLUX 2059809 · TMA1239404 · design | 9399-7070 Québec inc. | 1 Chemicals | Registered | 2024 |
| HYDRAULEX 1905412 · TMA1105525 · design | Attica Hydraulic Exchange, Inc. | 7 Machines35 Advertising37 Construction | Registered | 2021 |
| HYDRAULEX 1905411 · TMA1105524 | Attica Hydraulic Exchange, Inc. | 7 Machines35 Advertising37 Construction | Registered | 2021 |
| HYDRALERT 1864070 · TMA1081458 | Silversmith, Inc. DBA Silversmith Data | 9 Electronics38 Telecommunications42 Science | Registered | 2020 |
| HYDROLINK 1811547 · TMA1003988 | Trojan Battery Company, LLC, a Delaware limited liability company | 9 Electronics | Registered | 2018 |
| HYDROLOGIC 1784097 · TMA993162 | WaterFurnace International, Inc. an Indiana corporation | 7 Machines11 Lighting | Registered | 2018 |
| HYDROLINK 1754107 · TMA984987 | WaterFurnace International, Inc. (Corporation Indiana) | 9 Electronics | Registered | 2017 |
| HYDRAL 1693589 · TMA923995 | Huber Specialty Hydrates, LLC | 1 Chemicals | Registered | 2015 |
| HYDROLINK 1631777 · TMA1027115 | Toray Kabushiki Kaisha (Toray Industries Inc.) | 10 Medical | Registered | 2019 |
| HYDRALURON 1543518 · TMA862675 | Indeed Laboratories Inc. | 3 Cosmetics | Registered | 2013 |
| HYDRALBA 1465543 · TMA842794 | Owner not shown | 3 Cosmetics5 Pharmaceuticals | Registered | 2013 |