| DUROGEN 2079515 · TMA1284085 | Biyork Holdings Inc. | 19 Building | Registered | 2025 |
| DURASYN 0762303 · TMA539303 | INEOS Oligomers USA LLC | 1 Chemicals4 Oils | Registered | 2001 |
| DIREXYON 1864007 · TMA1077147 | Technologies Direxyon Inc. | 9 Electronics42 Science | Registered | 2020 |
| DURISAN 1831031 · TMA1040277 · design | Sanit Technologies, LLC | 3 Cosmetics5 Pharmaceuticals10 Medical+2 | Registered | 2019 |
| DURACON 1687691 · TMA1039924 · design | POLYPLASTICS CO. LTD. | 1 Chemicals17 Rubber | Registered | 2019 |
| DURAGEN 1603979 · TMA899808 | CONTINENTAL TIRE THE AMERICAS, LLC | 12 Vehicles | Registered | 2015 |
| DURACON 1578631 · TMA869530 | POLYPLASTICS CO. LTD. | 1 Chemicals17 Rubber | Registered | 2014 |
| DREXAN 1432517 · TMA764860 · design | Drexan Energy Systems Inc. | 9 Electronics16 Paper21 Housewares+3 | Registered | 2010 |
| DURCON 1191476 · TMA640140 | Laboratory Tops, Inc. dba Durcon Incorporated | 20 Furniture | Registered | 2005 |
| DURAGEN 1004750 · TMA832342 | Integra LifeSciences Corporation | 5 Pharmaceuticals | Registered | 2012 |
| DURAKON 0522459 · TMA307709 | DURAKON INDUSTRIES, INC. | 7 Machines11 Lighting12 Vehicles | Registered | 1985 |
| DIREXIN 0412507 · TMA244077 | Wyeth LLC a Delaware limited liability company | 5 Pharmaceuticals | Registered | 1980 |
| DURASAN 0256407 · TMA128711 | Gold Bond Building Products, LLC | 19 Building | Registered | 1962 |
| DREXAN 2297758 | Drexan Energy Systems Inc. | 9 Electronics11 Lighting | Pending | 2023 |
| DURISAN 1974539 | Sanit Technologies, LLC | 5 Pharmaceuticals10 Medical21 Housewares | Pending | 2019 |
| DURASMART 2262985 · TMA1281437 | NORBORD INC. | 19 Building | Registered | 2025 |
| DRAGONFLY 2243935 · TMA1263136 | Owner not listed | 44 Medical | Registered | 2024 |
| DRAGON 2243679 · TMA1263107 · design | Owner not listed | 30 Coffee | Registered | 2024 |
| DragonSon 2233976 · TMA1259711 | an individual | 20 Furniture | Registered | 2024 |
| DRAGONFLY 2182264 · TMA1213586 | Metrex Research, LLC | 10 Medical | Registered | 2023 |
| DRAGONX 2171185 · TMA1221521 | Dan Lok Education, Inc. | 36 Finance | Registered | 2024 |
| DRAGONTAIL 2162353 · TMA1241099 | an individual | 25 Clothing | Registered | 2024 |
| DRAGONHAWK 2162075 · TMA1212305 · design | Hangzhou Podong Trading Co. Ltd. | 2 Paints8 Hand | Registered | 2023 |
| Darkgamer 2159995 · TMA1230098 | XLGames, Inc. | 9 Electronics41 Education | Registered | 2024 |
| DRAGONFLY 2138265 · TMA1259288 | Alcon Inc. | 10 Medical | Registered | 2024 |