| Hydron 2063354 · TMA1197548 | Parador GmbH | 19 Building27 Carpets | Registered | 2023 |
| HYDRON 0421949 · TMA235344 | CooperVision International Limited | 9 Electronics11 Lighting | Registered | 1979 |
| HEDRON 2163457 | Halliburton Energy Services, Inc. | 7 Machines | Pending | 2022 |
| HYDRON 2132625 | Hydron Energy Inc. | 35 Advertising37 Construction40 Treatment+2 | Pending | 2021 |
| HADRIAN 1831887 · TMA1101650 | Fastbrick IP Pty Ltd, a legal entity | 1 Chemicals7 Machines9 Electronics+1 | Registered | 2021 |
| HEATRON 1433567 · TMA793647 · design | Heatron, Inc. | 9 Electronics11 Lighting | Registered | 2011 |
| HADRIAN 1188688 · TMA624101 | Hadrian Solutions ULC | 20 Furniture36 Finance38 Telecommunications+2 | Registered | 2004 |
| HYDERON 2327475 · design | Ningbo Hyderon Hardware Co. Ltd. | 20 Furniture | Pending | 2024 |
| HADRIAN 2219621 · design | an individual | 9 Electronics35 Advertising41 Education+2 | Pending | 2022 |
| HITRON 1786046 · TMA1006171 · design | Hitron Technologies Inc. | 9 Electronics | Registered | 2018 |
| 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 |
| HYDRAN 0517180 · TMA297609 | Owner not shown | 9 Electronics | Registered | 1984 |
| HYDRIN 0314966 · TMA167938 | an individual | 1 Chemicals | Registered | 1970 |
| HETRON 0224588 · UCA49812 | Ineos Composites IP, LLC | 1 Chemicals | Registered | 1954 |
| HITRON 2167686 | an individual | 7 Machines9 Electronics12 Vehicles+3 | Pending | 2022 |
| HEADROOM 2118197 · TMA1162742 | Headroom, Inc. | 9 Electronics42 Science | Registered | 2023 |
| HYDRONAR 1873585 · TMA1085615 | RIPRUP Company S.A. | 11 Lighting | Registered | 2020 |
| HYDRONIC 0823117 · TMA486110 | Eberspächer Climate Control Systems GmbH | 11 Lighting | Registered | 1997 |
| HYDRONIX 0681060 · TMA406813 | HYDRONIX LIMITED | 9 Electronics | Registered | 1993 |
| HYDRONOX 2326258 | Vireo Systems, Inc. | 5 Pharmaceuticals | Pending | 2024 |
| HODRANT 2169054 · TMA1205430 | an individual | 18 Leather | Registered | 2023 |
| HYDRANT 2007626 · TMA1119114 | HYDRANT, INC. | 5 Pharmaceuticals32 Beer | Registered | 2022 |
| 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 |