| COMPUCLEAN 1003510 · TMA548349 | SPARTAN CHEMICAL COMPANY, INC. (OHIO, CORPORATION) | 9 Electronics | Registered | 2001 |
| COMPUCAGE 0881526 · TMA547662 | Compucage International Inc. | 9 Electronics20 Furniture | Registered | 2001 |
| COMPUSERVE 0488823 · TMA277265 | AOL Membership Services LLC | 38 Telecommunications42 Science | Registered | 1983 |
| COMPUCENTRE 0448959 · TMA249950 | SYSTÈMES TMN INC. | 7 Machines8 Hand9 Electronics+10 | Registered | 1980 |
| COMPUCOLOR 0448211 · TMA248490 | Tab Products of Canada, Co. | 9 Electronics | Registered | 1980 |
| COMPUCESSORY 1243837 · TMA658851 | S.P. Richards Company | 3 Cosmetics6 Metal7 Machines+13 | Registered | 2006 |
| COMPUCESSORY 1243692 · TMA659183 · design | S.P. Richards Company | 3 Cosmetics7 Machines8 Hand+3 | Registered | 2006 |
| COMBOCURVE 2212057 · TMA1243060 | ComboCurve, Inc. | 42 Science | Registered | 2024 |
| COMPOCEL 1892544 · TMA1097264 · design | an individual | 6 Metal12 Vehicles17 Rubber+1 | Registered | 2021 |
| CompuCool 1774663 · TMA977565 | TECHNOLOGIES E4 INC. | 11 Lighting | Registered | 2017 |
| COMPACTOR 1739371 · TMA999054 · design | CIE EUROPE (Société par actions simplifiée) | 6 Metal9 Electronics14 Jewellery+3 | Registered | 2018 |
| COMPUSTAR 1650524 · TMA932186 | Firstech, LLC | 9 Electronics | Registered | 2016 |
| COMPACTOR 1622005 · TMA900778 · design | CIE EUROPE (Société par actions simplifiée) | 16 Paper18 Leather20 Furniture | Registered | 2015 |
| COMPOSER 1567374 · TMA853037 | JAMF Software, LLC | 9 Electronics | Registered | 2013 |
| COMPOSER 1567372 · TMA871141 · design | JAMF Software, LLC | 9 Electronics | Registered | 2014 |
| COMPACTOR 1552149 · TMA868110 | CIE EUROPE (Société par actions simplifiée) | 16 Paper18 Leather20 Furniture | Registered | 2014 |
| COMPACTCEM 1505109 · TMA808116 | CIMENT QUEBEC INC. | 19 Building | Registered | 2011 |
| COMPUCOM 1453901 · TMA807640 | COMPUCOM SYSTEMS, INC. | 35 Advertising37 Construction39 Transport+1 | Registered | 2011 |
| COMPOSER 1425537 · TMA798006 | Lensbaby, Inc. | 9 Electronics | Registered | 2011 |
| COMPACTPREP 1280762 · TMA717179 | QIAGEN GMBH | 1 Chemicals5 Pharmaceuticals9 Electronics | Registered | 2008 |
| 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 |
| COMBICLEAN 1184088 · TMA617894 | ECS Holdings, Inc. | 7 Machines | Registered | 2004 |
| COMPACTLINE 1114921 · TMA641907 | an individual | 9 Electronics | Registered | 2005 |
| COMBOSAVER 1097368 · TMA582156 | ACCO Brands Corporation | 6 Metal | Registered | 2003 |