| H2OGEN 2137632 · TMA1185433 | Technologies O=C=O Inc. | 7 Machines11 Lighting | Registered | 2023 |
| HYGEN 2054504 · TMA1278363 | Arxada, LLC | 5 Pharmaceuticals | Registered | 2024 |
| HY2GEN 1916040 · TMA1115766 · design | Owner not shown | 1 Chemicals6 Metal12 Vehicles+1 | Registered | 2021 |
| HEGEN 2141467 · TMA1242412 · design | Fitson Singapore Pte Ltd | 3 Cosmetics5 Pharmaceuticals6 Metal+13 | Registered | 2024 |
| HygCen 2057662 · TMA1154149 | HygCen Germany GmbH | 42 Science | Registered | 2022 |
| HEGEN 2040126 · TMA1169583 | Fitson Singapore Pte Ltd | 10 Medical21 Housewares35 Advertising | Registered | 2023 |
| HOGAN 1832110 · TMA1036151 · design | an individual | 9 Electronics | Registered | 2019 |
| HOGAN 1568040 · TMA902616 · design | an individual | 18 Leather25 Clothing28 Toys | Registered | 2015 |
| HOGAN 1252328 · TMA795788 · design | an individual | 14 Jewellery16 Paper18 Leather+2 | Registered | 2011 |
| HIGEN 1174878 · TMA681738 · design | HIGEN RNM Co. Ltd | 7 Machines | Registered | 2007 |
| HIGEN 1172861 · TMA698656 | HIGEN RNM Co. Ltd | 7 Machines | Registered | 2007 |
| HOUGEN 0705803 · TMA418656 · design | HOUGEN MANUFACTURING, INC. A MICHIGAN CORPORATION | 7 Machines | Registered | 1993 |
| HOUGEN 0705802 · TMA436134 | HOUGEN MANUFACTURING, INC. A CORPORATION OF THE STATE OF MICHIGAN | 7 Machines | Registered | 1994 |
| HOGAN 0636806 · TMA433247 | Perry Ellis International Europe Limited | 18 Leather25 Clothing28 Toys | Registered | 1994 |
| HYKEN 0319955 · TMA166382 | Phillips 66 Company | 4 Oils | Registered | 1969 |
| HEYGEN 2272561 | HeyGen Technology Inc. | 9 Electronics42 Science | Pending | 2023 |
| HyGenie 2022071 · TMA1132280 | Trium Environmental Inc. | 3 Cosmetics5 Pharmaceuticals | Registered | 2022 |
| HIOSSEN 1361261 · TMA729930 | Osstemimplant Co., Ltd. | 10 Medical | Registered | 2008 |
| HYGENIA 0766188 · TMA510895 | TERBRACK KUNSTSTOFF GMBH & CO. KG | 16 Paper | Registered | 1999 |
| HYGENIE 2334060 | ANGELCARE CANADA INC. | 16 Paper | Pending | 2024 |
| HYGENIE 2261562 | ANGELCARE CANADA INC. | 21 Housewares | Pending | 2023 |
| HEGAN 2163929 · TMA1265348 · design | ZHEJIANG HUAKANG PHARMACEUTICAL CO.LTD. | 1 Chemicals30 Coffee | Registered | 2024 |
| HASSEN 2149670 · TMA1187842 · design | Hachinohe Shuzo Co. Ltd. | 33 Wine | Registered | 2023 |
| Hagn 2080361 · TMA1197600 | an individual | 20 Furniture35 Advertising | Registered | 2023 |
| HAOZAN 2016451 · TMA1230780 · design | an individual | 21 Housewares | Registered | 2024 |