| DOCBOX 2177285 · TMA1194375 | an individual | 44 Medical | Registered | 2023 |
| DOCBOX 1681831 · TMA926445 | Wolfpack IP Co. | 38 Telecommunications42 Science | Registered | 2016 |
| DOCUBASE 1214262 · TMA712418 · design | an individual | 9 Electronics35 Advertising42 Science | Registered | 2008 |
| DOCFOCUS 1138754 · TMA598979 | DOCFOCUS INC. | 9 Electronics | Registered | 2004 |
| DOCUPOST 0787031 · TMA462880 | CANADA POST CORPORATION | 35 Advertising36 Finance38 Telecommunications+1 | Registered | 1996 |
| DOCUBOX 1588645 · TMA962518 | SPI International B.V. a Netherlands limited liability company | 38 Telecommunications41 Education | Registered | 2017 |
| DOGBOOK 1444940 · TMA876333 | Meta Platforms, Inc. | 9 Electronics35 Advertising38 Telecommunications+2 | Registered | 2014 |
| DOSBAS 1430837 · TMA786310 · design | Energy Control Limited | 9 Electronics | Registered | 2011 |
| DOGBOOK 1385829 · TMA787335 | Meta Platforms, Inc. | 16 Paper42 Science | Registered | 2011 |
| DAOZWUBGIH 2264121 · TMA1284807 | Shenzhen Dongshi E-commerce Co. Ltd | 21 Housewares | Registered | 2025 |
| DCVC 2260122 · TMA1277966 | DCVC MANAGEMENT CO, LLC | 36 Finance | Registered | 2024 |
| DJAPWPX 2252778 · TMA1272874 | Shanghai Jiaxi Network Technology Co. Ltd. | 28 Toys | Registered | 2024 |
| dojobkinb 2236386 · TMA1259745 | an individual | 19 Building | Registered | 2024 |
| DOGPACK 2210331 · TMA1242903 · design | DogPack App Inc. | 31 Fresh | Registered | 2024 |
| DOGPACK 2208213 · TMA1244101 · design | DogPack App Inc. | 9 Electronics42 Science45 Legal | Registered | 2024 |
| DASVISION 2093969 · TMA1189347 | Abitibi Géophysique inc. | 42 Science | Registered | 2023 |
| DexyPaws 2080194 · TMA1284107 | an individual | 35 Advertising | Registered | 2025 |
| DSBJ 2074484 · TMA1185979 · design | Suzhou DongshanPrecision Manufacturing Co. Ltd. | 40 Treatment | Registered | 2023 |
| DASHPASS 1913944 · TMA1077123 | DOORDASH INC. | 35 Advertising39 Transport | Registered | 2020 |
| DECAPPUCCINO 1907791 · TMA1088417 | J.E. MONDOU LTEE | 30 Coffee | Registered | 2020 |
| DIGIVISION 1898303 · TMA1046940 | Alcon Inc. | 9 Electronics | Registered | 2019 |
| DISPOSERX 1889077 · TMA1090006 | DISPOSERX, INC. | 1 Chemicals44 Medical | Registered | 2020 |
| DIGIVIZER 1862788 · TMA1081990 | DIGIVIZER PTY LTD | 9 Electronics35 Advertising42 Science | Registered | 2020 |
| DOGFISH 1840623 · TMA1063734 | Dogfish Head Marketing, LLC | 21 Housewares25 Clothing32 Beer+1 | Registered | 2019 |
| DISPASE 1837145 · TMA1072961 | GODO SHUSEI CO. LTD. | 1 Chemicals5 Pharmaceuticals30 Coffee | Registered | 2020 |