| CompuCool 1774663 · TMA977565 | TECHNOLOGIES E4 INC. | 11 Lighting | Registered | 2017 |
| COMBOCORE 2344758 | Owner not listed | 42 Science | Pending | 2024 |
| COMBOCLIP 2045563 · TMA1183571 · design | Hangzhou AGS MedTech Co. Ltd. | 10 Medical | Registered | 2023 |
| COMPOCEL 1892544 · TMA1097264 · design | an individual | 6 Metal12 Vehicles17 Rubber+1 | Registered | 2021 |
| ComboCap 1864579 · TMA1094473 | ComboCap, Inc. | 5 Pharmaceuticals40 Treatment | Registered | 2021 |
| COMBOCARE 1650840 · TMA903689 | Roscoe Medical, Inc. | 10 Medical | Registered | 2015 |
| COMBOSTOP 1529809 · TMA842349 | an individual | 5 Pharmaceuticals | Registered | 2013 |
| COMBICON 0876947 · TMA519620 | Phoenix Contact GmbH & Co. KG | 9 Electronics | Registered | 1999 |
| ComboCard 0907635 | HER MAJESTY THE QUEEN IN RIGHT OF ONTARIO AS REPRESENTED BY THE MINISTRY OF TRANSPORTATION | 1 Chemicals2 Paints3 Cosmetics+42 | Pending | 1995 |
| COMBOCARBON 2243721 · TMA1243400 | Owner not listed | 42 Science | Registered | 2024 |
| COMPOSICOIL 1748451 · TMA1002342 | Owner not shown | 12 Vehicles | Registered | 2018 |
| CompactCool 2244199 | Owner not listed | 9 Electronics37 Construction | Pending | 2022 |
| COMBOCURVE 2212057 · TMA1243060 | ComboCurve, Inc. | 42 Science | Registered | 2024 |
| COMPUCOLOR 0448211 · TMA248490 | Tab Products of Canada, Co. | 9 Electronics | Registered | 1980 |
| COMBOSYNC 2243877 · TMA1243402 | Owner not listed | 42 Science | Registered | 2024 |
| ComfyCozy 2121913 · TMA1191991 | an individual | 25 Clothing | Registered | 2023 |
| COMPOXELL 1948608 · TMA1240577 | an individual | 2 Paints3 Cosmetics | Registered | 2024 |
| combiGo 1816410 · TMA1008765 | an individual | 20 Furniture | Registered | 2018 |
| COMPACTOR 1739371 · TMA999054 · design | CIE EUROPE (Société par actions simplifiée) | 6 Metal9 Electronics14 Jewellery+3 | Registered | 2018 |
| COMPACTOR 1622005 · TMA900778 · design | CIE EUROPE (Société par actions simplifiée) | 16 Paper18 Leather20 Furniture | Registered | 2015 |
| COMPACTOR 1552149 · TMA868110 | CIE EUROPE (Société par actions simplifiée) | 16 Paper18 Leather20 Furniture | Registered | 2014 |
| COMBOX 1508157 · TMA832964 | JULIUS BLUM GMBH | 9 Electronics | Registered | 2012 |
| COMBOQUIT 1455574 · TMA793315 | an individual | 5 Pharmaceuticals44 Medical | Registered | 2011 |
| COMPUCOM 1453901 · TMA807640 | COMPUCOM SYSTEMS, INC. | 35 Advertising37 Construction39 Transport+1 | Registered | 2011 |
| COMBOS + 1285408 · TMA715443 · design | The Procter & Gamble Company | 3 Cosmetics5 Pharmaceuticals | Registered | 2008 |