| COMBOCARE 1650840 · TMA903689 | Roscoe Medical, Inc. | 10 Medical | Registered | 2015 |
| COMBOCURVE 2212057 · TMA1243060 | ComboCurve, Inc. | 42 Science | Registered | 2024 |
| COMBOCOOL 2325013 | Owner not listed | 20 Furniture24 Textiles | Pending | 2024 |
| ComboCard 0907635 | HER MAJESTY THE QUEEN IN RIGHT OF ONTARIO AS REPRESENTED BY THE MINISTRY OF TRANSPORTATION | 1 Chemicals2 Paints3 Cosmetics+42 | Pending | 1995 |
| COMPOSICORE 1362564 · TMA833419 | Barrette Outdoor Living, Inc | 19 Building | Registered | 2012 |
| COMBOCLIP 2045563 · TMA1183571 · design | Hangzhou AGS MedTech Co. Ltd. | 10 Medical | Registered | 2023 |
| ComboCap 1864579 · TMA1094473 | ComboCap, Inc. | 5 Pharmaceuticals40 Treatment | Registered | 2021 |
| CONVOCARE 1810062 · TMA1054898 | CONVOTHERM Elektrogeräte GmbH | 1 Chemicals3 Cosmetics | Registered | 2019 |
| COMPOSURE 1439841 · TMA778135 | an individual | 10 Medical | Registered | 2010 |
| CompCote 1266989 · TMA729202 | Compcote International Inc. | 40 Treatment | Registered | 2008 |
| COMPCARE 1225123 · TMA676004 | Goodman Manufacturing Company, L.P. (a Texas corporation) | 36 Finance | Registered | 2006 |
| COMBICON 0876947 · TMA519620 | Phoenix Contact GmbH & Co. KG | 9 Electronics | Registered | 1999 |
| COMPCORP 0700031 · TMA412664 | Canadian Life and Health Insurance Compensation Corporation Sociéte Canadienne D'indemnisation Pour Les Assurances De Personnes | 36 Finance | Registered | 1993 |
| COMPOSURE 2282551 | FoodScience, LLC | 5 Pharmaceuticals | Pending | 2023 |
| COMBOCARBON 2243721 · TMA1243400 | Owner not listed | 42 Science | Registered | 2024 |
| COMPOSECURE 1990732 · TMA1100416 | an individual | 9 Electronics16 Paper40 Treatment+1 | Registered | 2021 |
| combiscale 1136538 · TMA608747 | PAX IP INC. | 7 Machines | Registered | 2004 |
| COMBOSAVER 1097368 · TMA582156 | ACCO Brands Corporation | 6 Metal | Registered | 2003 |
| COMPUSCOPE 0604829 · TMA358946 | Gage Applied Technologies Inc. | 9 Electronics | Registered | 1989 |
| COMBOSYNC 2243877 · TMA1243402 | Owner not listed | 42 Science | Registered | 2024 |
| ComfyCozy 2121913 · TMA1191991 | an individual | 25 Clothing | Registered | 2023 |
| COMPOZITE 2005346 · TMA1108299 | Oz Lifting Products, LLC | 7 Machines | Registered | 2021 |
| COMPOCEL 1892544 · TMA1097264 · design | an individual | 6 Metal12 Vehicles17 Rubber+1 | Registered | 2021 |
| COMPOSE 1849646 · TMA1060535 | Masterchem Industries LLC | 2 Paints | Registered | 2019 |
| CONFYCARE 1824117 · TMA1000059 · design | HUANGSHAN JINFU MEDICAL EQUIPMENT CO. LTD | 10 Medical | Registered | 2018 |