| DOC 2125386 · TMA1231046 | "Dr. Martens" International Trading GmbH; "Dr. Maertens" Marketing GmbH | 25 Clothing | Registered | 2024 |
| DOC 1610268 · TMA926622 · design | The Canadian Association of Optometrists | 6 Metal9 Electronics14 Jewellery+8 | Registered | 2016 |
| DOC 1241113 · TMA661447 | Cranial Technologies, Inc. | 10 Medical | Registered | 2006 |
| DOC 1179659 · TMA667160 | RailComm LLC | 9 Electronics | Registered | 2006 |
| T-DOC 1797043 · TMA980110 | Laborie Medical Technologies Corp. | 10 Medical | Registered | 2017 |
| DOC'S 1680491 · TMA974274 | "DR. MARTENS" INTERNATIONAL TRADING GmbH and "DR. MAERTENS"MARKETING GmbH, A PARTNERSHIP | 18 Leather25 Clothing | Registered | 2017 |
| DOC.IT 1821605 · TMA1096536 · design | Doc-It Inc. | 9 Electronics | Registered | 2021 |
| DOC.IT 1821599 · TMA1096805 | Doc-It Inc. | 9 Electronics | Registered | 2021 |
| DOC IT 1468636 · TMA822251 | Cana-Vac Systems Inc. | 7 Machines37 Construction | Registered | 2012 |
| AD'DOC 1123586 · TMA597120 | New Eyes Objects Systems Inc. | 9 Electronics35 Advertising38 Telecommunications+2 | Registered | 2003 |
| DOC IT 1103766 · TMA625443 · design | Doc-It Inc. | 9 Electronics | Registered | 2004 |
| DOC POP 2260611 · TMA1254246 | VNGR Beverage, LLC | 32 Beer | Registered | 2024 |
| MON DOC 1840090 · TMA1071280 · design | an individual | 44 Medical | Registered | 2020 |
| PRO DOC 1475490 · TMA794194 | Pro Doc Ltée | 5 Pharmaceuticals | Registered | 2011 |
| eco-doc 1416111 · TMA822964 | LOGIX DATA PRODUCTS, INC. | 9 Electronics16 Paper35 Advertising+8 | Registered | 2012 |
| Doc + Glo 2251739 | DOC & GLO LLC | 3 Cosmetics | Pending | 2023 |
| CAN/DOC 0900080 · design | NATIONAL RESEARCH COUNCIL, CANADA INSTITUTE FOR SCIENTIFIC AND TECHNICAL INFORMATION | 1 Chemicals2 Paints3 Cosmetics+42 | Pending | 1980 |
| Li'l Doc 1943880 · TMA1176097 | Gala Productions Inc. | 8 Hand9 Electronics11 Lighting+5 | Registered | 2023 |
| DOC CLUB 1721901 · TMA974219 | an individual | 9 Electronics38 Telecommunications41 Education | Registered | 2017 |
| IRON DOC 1460522 · TMA839755 | PEAK MD Inc. | 9 Electronics16 Paper35 Advertising+4 | Registered | 2013 |
| DOC CALM 1436964 · TMA767870 | an individual | 41 Education | Registered | 2010 |
| DOC BAND 1143710 · TMA634074 | Cranial Technologies, Inc. | 10 Medical | Registered | 2005 |
| Doc Style 2106888 · TMA1214085 | "Dr.Maertens" Marketing GmbH; "Dr.Martens" International Trading GmbH | 25 Clothing | Registered | 2023 |
| DOC-SMART 1609199 · TMA914771 | RODAN & FIELDS, LLC a California limited liability company | 3 Cosmetics5 Pharmaceuticals21 Housewares+1 | Registered | 2015 |
| DONOR DOC 1354464 · TMA855030 | GLOBAL MED TECHNOLOGIES, INC. | 9 Electronics42 Science | Registered | 2013 |