| HRDRIVE 1844554 · TMA1099424 | HRDOWNLOADS INC. | 9 Electronics35 Advertising36 Finance+4 | Registered | 2021 |
| Heartrition 1679152 · TMA930264 | 2201371 Ontario Inc. | 5 Pharmaceuticals | Registered | 2016 |
| HEARTDROPS 1117651 · TMA580185 | STRAUSS NATURALS LTD. | 5 Pharmaceuticals | Registered | 2003 |
| HEARTWIRE 1041463 · TMA552243 | WEBMD LLC a Delaware limited liability company | 42 Science | Registered | 2001 |
| HEARTERRIFIC 2371159 | an individual | 41 Education | Pending | 2024 |
| HARDWIRE 2093425 · TMA1207203 | Hardwire, LLC | 9 Electronics | Registered | 2023 |
| HARDRON 1842628 · TMA1013851 · design | SANGSIN BRAKE CO. LTD. | 7 Machines12 Vehicles | Registered | 2019 |
| HORTURION 1840825 · TMA1051552 | BLV Licht - und Vakuumtechnik GmbH | 9 Electronics11 Lighting | Registered | 2019 |
| HARTURIS 1793042 · TMA1039161 | Merck Sharp & Dohme Corp. | 5 Pharmaceuticals | Registered | 2019 |
| HEARTRAIL 1443950 · TMA825866 | TERUMO KABUSHIKI KAISHA, ALSO TRADING AS TERUMO CORPORATION, A JAPANESE CORPORATION | 10 Medical | Registered | 2012 |
| HARTREX 1323581 · TMA768103 | Harbour Industries Ltd. | 9 Electronics | Registered | 2010 |
| HEARTHROOM 0488744 · TMA284526 | MARRIOTT WORLDWIDE CORPORATION, (A MARYLAND CORPORATION) | 35 Advertising43 Restaurants | Registered | 1983 |
| Herture 2361062 | Zhengzhou Ouqun Trading Co. Ltd. | 20 Furniture | Pending | 2024 |
| HEROTHORN 2241617 · TMA1261582 | Shanghai Shangjiao Industrial Co. Ltd | 25 Clothing | Registered | 2024 |
| HAIRDREAMS 2167485 · TMA1242478 | Hairdreams Haarhandels GmbH | 3 Cosmetics8 Hand10 Medical+3 | Registered | 2024 |
| HAIRDRENALINE 2158940 · TMA1213234 | Unilever Canada Inc. | 3 Cosmetics | Registered | 2023 |
| HYRTRYP 2109905 · TMA1158401 | HYCLONE LABORATORIES,LLC | 1 Chemicals | Registered | 2022 |
| HEARTWARMING 1955138 · TMA1211500 | Harlequin Enterprises ULC | 9 Electronics16 Paper41 Education | Registered | 2023 |
| HAIRDIRECT 1887613 · TMA1075722 | HairDirect, Inc. | 26 Sewing40 Treatment | Registered | 2020 |
| HAIRDORABLES 1880055 · TMA1055514 | Just Play, LLC | 28 Toys | Registered | 2019 |
| HARDIEREWARDS 1873436 · TMA1044270 | James Hardie Technology Limited | 35 Advertising | Registered | 2019 |
| HARDIEREWARDS 1873435 · TMA1044277 · design | James Hardie Technology Limited | 35 Advertising | Registered | 2019 |
| HARTREQA 1704735 · TMA1060050 | Merck Sharp & Dohme Corp. | 5 Pharmaceuticals | Registered | 2019 |
| HERE2THERE 1637313 · TMA939064 | Intelematics Australia Pty Ltd | 9 Electronics39 Transport42 Science | Registered | 2016 |
| HARDERPLATE 1631101 · TMA889195 | Raptor Mining Products Inc. | 7 Machines | Registered | 2014 |