| HEATRON 1433567 · TMA793647 · design | Heatron, Inc. | 9 Electronics11 Lighting | Registered | 2011 |
| 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 |
| HITRON 2167686 | an individual | 7 Machines9 Electronics12 Vehicles+3 | Pending | 2022 |
| HEDRON 2163457 | Halliburton Energy Services, Inc. | 7 Machines | Pending | 2022 |
| HETHRONE 2079079 · TMA1171143 | Jinhua Shunwei Network Technology Co.Ltd. | 2 Paints8 Hand | Registered | 2023 |
| HETHRONE 2059993 · TMA1189213 | Jinhua Shunwei Network Technology Co.Ltd. | 16 Paper18 Leather | Registered | 2023 |
| HETRONIC 1799562 · TMA1052484 · design | Hetronic International, Inc. | 9 Electronics | Registered | 2019 |
| HETRONIC 1347033 · TMA781435 | Hetronic International, Inc. | 9 Electronics | Registered | 2010 |
| HADRON 2181160 · TMA1230213 | KOHLER CO. | 20 Furniture | Registered | 2024 |
| Hydron 2063354 · TMA1197548 | Parador GmbH | 19 Building27 Carpets | Registered | 2023 |
| HYTRIN 1470642 · TMA787589 | an individual | 5 Pharmaceuticals | Registered | 2011 |
| HEDRIN 1319045 · TMA743875 | Thornton & Ross Limited | 5 Pharmaceuticals | Registered | 2009 |
| HYTRIN 0540458 · TMA360118 | an individual | 5 Pharmaceuticals | Registered | 1989 |
| HYDRON 0421949 · TMA235344 | CooperVision International Limited | 9 Electronics11 Lighting | Registered | 1979 |
| HYDRON 2132625 | Hydron Energy Inc. | 35 Advertising37 Construction40 Treatment+2 | Pending | 2021 |
| HYTRONIK 1447122 · TMA829076 · design | WELLSOLID LTD | 6 Metal9 Electronics11 Lighting+1 | Registered | 2012 |
| HOTRONIC 0681832 · TMA396808 | WINTERSTEIGER Sports GmbH | 11 Lighting | Registered | 1992 |
| HOTRONIX 0593973 · TMA381014 | STAHLS' INC. | 7 Machines | Registered | 1991 |
| HYTREND 1917455 · TMA1097345 | Hytrend Investments Group Ltd. | 35 Advertising | Registered | 2021 |
| HEDRINE 1888633 · TMA1171743 | CENTRE NATIONAL HOSPITALIER D'INFORMATION SUR LE MÉDICAMENT-CNHIM | 9 Electronics38 Telecommunications44 Medical | Registered | 2023 |
| HITRANZ 1533620 · TMA826530 | Emblemtek Solutions Group Inc. | 9 Electronics16 Paper | Registered | 2012 |
| HATHORN 2368997 · design | Minicam Ltd. | 9 Electronics | Pending | 2024 |
| HYDERON 2327475 · design | Ningbo Hyderon Hardware Co. Ltd. | 20 Furniture | Pending | 2024 |
| HOTORONTO 0744306 · TMA471457 · design | JCO COMMUNICATIONS INC. | 9 Electronics16 Paper18 Leather+2 | Registered | 1997 |