| DALOG 2067165 · TMA1204827 | an individual | 9 Electronics37 Construction41 Education+1 | Registered | 2023 |
| DALS 1930241 · TMA1148336 | DALS LIGHTING INC. | 9 Electronics11 Lighting | Registered | 2022 |
| DIALOG 1846597 · TMA1011486 | DIALOG SOLUTIONS INC. | 9 Electronics35 Advertising36 Finance+2 | Registered | 2018 |
| DIALOG 1745155 · TMA974029 | an individual | 10 Medical | Registered | 2017 |
| DELOS 1717388 · TMA956326 | Delos Living LLC | 9 Electronics37 Construction40 Treatment+2 | Registered | 2016 |
| DUALOS 1711374 · TMA983875 | Light & Wonder, Inc. | 28 Toys | Registered | 2017 |
| DIALOG + 1598696 · TMA904196 · design | an individual | 10 Medical | Registered | 2015 |
| DIALOG 1510444 · TMA827204 | Universal Lighting Technologies, Inc. | 9 Electronics | Registered | 2012 |
| DIALOG 1495767 · TMA807127 · design | Owner not shown | 37 Construction42 Science44 Medical | Registered | 2011 |
| DIALOG 1487968 · TMA800892 | Owner not shown | 37 Construction42 Science44 Medical | Registered | 2011 |
| DALIS 1210062 · TMA645781 | Owner not shown | 9 Electronics | Registered | 2005 |
| DYLOG 1055201 · TMA568266 · design | an individual | 9 Electronics42 Science | Registered | 2002 |
| DALLAS 0511647 · TMA298776 | Warner Bros. Entertainment Inc. (a Delaware Corporation) | 35 Advertising41 Education | Registered | 1985 |
| DIALOG 0477616 · TMA270510 | DECKEL MAHO GMBH | 7 Machines9 Electronics | Registered | 1982 |
| DIALOG 0417871 · TMA242977 | Proquest LLC a Michigan limited liability corporation | 16 Paper39 Transport | Registered | 1980 |
| DIALOG 0285395 · TMA141378 · design | an individual | 9 Electronics | Registered | 1965 |
| DIALOGUE 2089005 · TMA1206020 | Prentke Romich Company | 9 Electronics | Registered | 2023 |
| DIALOGUE 1801403 · TMA1110814 | Dialogue Health Technologies Inc. | 35 Advertising38 Telecommunications41 Education+2 | Registered | 2021 |
| DIALOGUE 1403313 · TMA820015 · design | an individual | 16 Paper25 Clothing | Registered | 2012 |
| DIALOGUE 0900527 | DEPARTMENT OF INDUSTRY, TRADE & COMMERCE, STANDARDS COUNCIL OF CANADA | 1 Chemicals2 Paints3 Cosmetics+42 | Pending | 1979 |
| DAILYGO 2187266 · TMA1231624 · design | AMYTAG Enterprises Ltd | 9 Electronics18 Leather | Registered | 2024 |
| DUALAGO 2057268 · TMA1233206 | BRISTOL-MYERS SQUIBB COMPANY | 5 Pharmaceuticals | Registered | 2024 |
| DUOLOGY 2033568 · TMA1165383 | Owner not shown | 24 Textiles25 Clothing | Registered | 2023 |
| DIALLOG 1446562 · TMA790897 · design | Diallog Telecommunications Corp. | 9 Electronics16 Paper35 Advertising+1 | Registered | 2011 |
| DIALOCK 1075731 · TMA567268 · design | Häfele GmbH & Co. KG | 6 Metal7 Machines9 Electronics | Registered | 2002 |