| DOCLOCK 1360280 · TMA791194 | SPACESAVER CORPORATION A WISCONSIN CORPORATION | 20 Furniture | Registered | 2011 |
| DOCULOCK 0835466 · TMA513956 | XEROX CORPORATION | 9 Electronics35 Advertising42 Science | Registered | 1999 |
| DOSEOLOGY 2009449 | Doseology Sciences Inc. | 1 Chemicals5 Pharmaceuticals9 Electronics+4 | Pending | 2020 |
| DESELEC 2229789 · TMA1248938 | Owner not shown | 7 Machines11 Lighting | Registered | 2024 |
| DESSLOC 1940801 · TMA1108462 | an individual | 10 Medical | Registered | 2021 |
| DIGILOCK 1712416 · TMA967922 | Security People, Inc. | 9 Electronics | Registered | 2017 |
| DECKLOCK 1519316 · TMA830697 | Strategis International Inc. | 19 Building | Registered | 2012 |
| DISKLOK 2345527 | Owner not listed | 12 Vehicles | Pending | 2024 |
| DESLOC 2332024 | Zhejiang Desman Intelligent Technology Co. LTD. | 6 Metal | Pending | 2024 |
| DESLOC 2332022 | Zhejiang Desman Intelligent Technology Co. LTD. | 9 Electronics | Pending | 2024 |
| docklocs 2303446 | Owner not listed | 10 Medical | Pending | 2023 |
| DayClocks 2241475 · TMA1264206 | DayTime, LLC dba DayClocks | 14 Jewellery | Registered | 2024 |
| DAYCLOCKS 2241337 · TMA1264205 · design | DayTime, LLC dba DayClocks | 14 Jewellery | Registered | 2024 |
| dyslexperts 2259228 · TMA1277862 | an individual | 41 Education | Registered | 2024 |
| DecoWalls 2201323 · TMA1248158 | an individual | 17 Rubber27 Carpets | Registered | 2024 |
| DOESLAG 2201310 · TMA1238683 | dongguanshizhongchenjienengkejiyouxiangongsi | 11 Lighting | Registered | 2024 |
| Dxles 2103760 · TMA1190666 | an individual | 28 Toys | Registered | 2023 |
| DOUGLASBED 2062587 · TMA1143823 | GOODMORNING.COM INC. | 20 Furniture24 Textiles35 Advertising | Registered | 2022 |
| DouglaX 2012381 · TMA1133970 | DOUGLAX CAPITAL GROUP LTD. | 29 Meat30 Coffee32 Beer+1 | Registered | 2022 |
| DOUGLAS 1969050 · TMA1139243 | GOODMORNING.COM INC. | 20 Furniture24 Textiles35 Advertising | Registered | 2022 |
| DOUGLAS 1942527 · TMA1144208 · design | GOODMORNING.COM INC. | 20 Furniture24 Textiles35 Advertising | Registered | 2022 |
| DISLIKE 1919205 · TMA1111591 | Enhanced Fertilizer Technologies, LLC | 1 Chemicals | Registered | 2021 |
| DOUGLAS 1896929 · TMA1136978 · design | Parfümerie Douglas GmbH & Co. KG | 3 Cosmetics4 Oils5 Pharmaceuticals+16 | Registered | 2022 |
| DZELCAT 1896357 · TMA1081903 · design | David Tremblay F.D.InnoVations inc. | 21 Housewares27 Carpets | Registered | 2020 |
| DECLIC 1878178 · TMA1059331 | Owner not shown | 32 Beer33 Wine | Registered | 2019 |