| DEXCOM 1626225 · TMA916515 | DexCom, Inc. | 9 Electronics10 Medical44 Medical | Registered | 2015 |
| DASCOM 1461185 · TMA866321 · design | Beijing Dascom Electronics Co. Ltd. | 9 Electronics | Registered | 2013 |
| DESCON 2279282 | Owner not listed | 6 Metal7 Machines9 Electronics+4 | Pending | 2023 |
| Deecam 2257661 · TMA1276386 | Shenzhen Tianlaimei Trading Co. Ltd | 6 Metal | Registered | 2024 |
| DESINO 2232305 · TMA1223937 | Shenzhen Yueshen Technology Co. Ltd. | 20 Furniture | Registered | 2024 |
| DESONO 2120953 · TMA1211929 | Biamp Systems, LLC | 9 Electronics | Registered | 2023 |
| DEACON 1958223 · TMA1224776 | MARKER DALBELLO VÖLKL (INTERNATIONAL) GmbH | 28 Toys | Registered | 2024 |
| DESON 1942232 · TMA1186847 · design | Deson Hospitality Equipment Design (Shenzhen) Co. Ltd. | 20 Furniture35 Advertising | Registered | 2023 |
| DIACOM 1853412 · TMA1044179 · design | an individual | 9 Electronics10 Medical | Registered | 2019 |
| DICOM 1773531 · TMA984244 · design | Dicom Transportation Group Canada, Inc. | 39 Transport | Registered | 2017 |
| DICOM 1766586 · TMA959759 | Dicom Transportation Group Canada, Inc. | 39 Transport | Registered | 2017 |
| DISHOOM 1639422 · TMA1043165 | Dishoom Limited | 3 Cosmetics29 Meat30 Coffee+2 | Registered | 2019 |
| DCOM 1530757 · TMA833422 | Continuous Learning Group, Inc. an Ohio corporation | 35 Advertising | Registered | 2012 |
| DESMO 1463705 · TMA804087 | Woodway USA, Inc. | 28 Toys | Registered | 2011 |
| DEXCON 1429796 · TMA792309 | DEXCON | 37 Construction39 Transport44 Medical | Registered | 2011 |
| Dacom 1402750 · TMA750715 | Dacom Technical Services Inc. | 38 Telecommunications42 Science | Registered | 2009 |
| DUOCOM 1394261 · TMA746289 | DUOCOM CANADA INC. | 37 Construction41 Education42 Science | Registered | 2009 |
| DESCAN 1135995 · TMA630992 | DESCO PLUMBING AND HEATING SUPPLY INC. | 35 Advertising | Registered | 2005 |
| DDCOM 0874120 · TMA539548 | DOUBLE DIAMOND ELECTRONICS LTD. | 9 Electronics35 Advertising37 Construction | Registered | 2001 |
| DICOM 0813984 · TMA536791 | NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION | 42 Science | Registered | 2000 |
| DECON 0619964 · TMA363839 · design | Decon U.S.A. Inc. | 6 Metal | Registered | 1989 |
| DECON 0619963 · TMA363212 · design | Decon U.S.A. Inc. | 6 Metal | Registered | 1989 |
| DECOMA 0590458 · TMA374721 | Magna International Inc. | 7 Machines9 Electronics40 Treatment+1 | Registered | 1990 |
| DISHOOM 2354633 | Dishoom Limited | 35 Advertising43 Restaurants | Pending | 2024 |
| DEACON 2203569 · design | WHITMORE MANUFACTURING, LLC | 17 Rubber | Pending | 2022 |