| CERTANIUM 0286192 · TMA140834 | Lawson Products, Inc. an Illinois corporation | 1 Chemicals2 Paints6 Metal+1 | Registered | 1965 |
| CERATANIUM 1673943 · TMA1007006 | RICHEMONT INTERNATIONAL SA | 14 Jewellery | Registered | 2018 |
| CERTIUM 2034755 · TMA1163247 | ROHDE & SCHWARZ GMBH & CO. KG | 9 Electronics35 Advertising38 Telecommunications+3 | Registered | 2023 |
| CORTANA 1685936 · TMA995056 | Microsoft Corporation | 9 Electronics35 Advertising38 Telecommunications+5 | Registered | 2018 |
| CORTANA 1154437 · TMA742645 | Microsoft Corporation | 28 Toys | Registered | 2009 |
| CORTENIC 2322293 | an individual | 9 Electronics38 Telecommunications42 Science+1 | Pending | 2024 |
| Cartanfill 2296808 | Changchun Jinyi Craft Gifts Co. Ltd. | 28 Toys | Pending | 2023 |
| CORTINA 2128201 · TMA1172870 | Keter Home and Garden Products Ltd. | 20 Furniture | Registered | 2023 |
| CORTINA 2080474 · TMA1141472 | Keter Home and Garden Products Ltd. | 19 Building | Registered | 2022 |
| CORTEN 1914151 · TMA1127676 | Corten Management UK Limited | 35 Advertising36 Finance | Registered | 2022 |
| CORTINA 1672803 · TMA920693 | Cortina Foods Inc. | 30 Coffee | Registered | 2015 |
| CORTINA 1437702 · TMA765418 | Cortina Foods Inc. | 29 Meat30 Coffee31 Fresh+2 | Registered | 2010 |
| CORTENAER 1137917 · TMA600494 | ViFloor Canada Limited | 24 Textiles27 Carpets | Registered | 2004 |
| CORTINA 1075233 · TMA574646 | TARKETT USA INC. | 19 Building | Registered | 2003 |
| CORTINA 0896844 · TMA562753 | Owner not shown | 7 Machines | Registered | 2002 |
| CORTENEMA 0804905 · TMA478754 | ANIP Acquisition Company | 5 Pharmaceuticals | Registered | 1997 |
| CORTENEMA 0552664 · TMA479093 | ANIP Acquisition Company | 5 Pharmaceuticals | Registered | 1997 |
| CORTAMED 0357023 · TMA195259 | Sandoz Canada Inc. | 5 Pharmaceuticals | Registered | 1973 |
| CORTINA 2336679 | an individual | 5 Pharmaceuticals | Pending | 2024 |
| CERTINIA 2253707 | Certinia Inc. | 42 Science | Pending | 2023 |
| CORTONA 2185534 | FGI Industries Inc. | 11 Lighting19 Building | Pending | 2022 |
| Cortona 1283554 | Owner not shown | 33 Wine | Pending | 2006 |
| Creationspace 2262840 · TMA1284737 | Suzhou Creation Space Intelligent Technology Co, Ltd | 7 Machines | Registered | 2025 |
| CurATime 2215597 · TMA1233956 | TRON - Translationale Onkologie an der Universitätsmedizin der Johannes Gutenberg- Universität Mainz gemeinnützige GmbH | 42 Science44 Medical | Registered | 2024 |
| CREDENTIALS 2192954 · TMA1218729 · design | The Upper Deck Company | 9 Electronics16 Paper | Registered | 2024 |