| CONFLICT 2157728 · TMA1238225 · design | an individual | 25 Clothing | Registered | 2024 |
| CONFLICT 1507063 · TMA880514 | Penn Fishing Tackle Mfg. Company | 28 Toys | Registered | 2014 |
| CONFLEET 1081213 · TMA581941 | CONSOLIDATED FLEET PURCHASING INC. | 35 Advertising36 Finance42 Science | Registered | 2003 |
| CONFLEX 0261574 · TMA124943 | SAFRAN ELECTRICAL COMPONENTS UK Ltd | 9 Electronics | Registered | 1962 |
| CONFLUENT 1760653 · TMA1101585 | Confluent, Inc. | 9 Electronics42 Science | Registered | 2021 |
| Coinplay 2162776 · TMA1212334 | an individual | 36 Finance | Registered | 2023 |
| COINFLIP 2110129 · TMA1192636 · design | GPD Holdings, LLC | 9 Electronics36 Finance | Registered | 2023 |
| COINFLIP 2110123 · TMA1193442 | GPD Holdings, LLC | 9 Electronics36 Finance | Registered | 2023 |
| COMFILAX 1919059 · TMA1109117 · design | CellChem Pharmaceuticals Inc. | 5 Pharmaceuticals | Registered | 2021 |
| COMPLAST 1888254 · TMA1084864 | an individual | 6 Metal | Registered | 2020 |
| CONOFLOW 1098130 · TMA572571 | ITT Manufacturing Enterprises LLC | 9 Electronics10 Medical13 Firearms | Registered | 2002 |
| CONOFLOW 0882329 · TMA530534 | ITT Manufacturing Enterprises LLC | 9 Electronics | Registered | 2000 |
| COMPLEAT 0873903 · TMA574401 | Owner not shown | 5 Pharmaceuticals29 Meat | Registered | 2003 |
| COMPLAIT 0628052 · TMA369530 | Cargill Limited | 31 Fresh | Registered | 1990 |
| CANPLAST 0537004 · TMA311844 | Surteco Canada Ltd. | 7 Machines19 Building28 Toys+1 | Registered | 1986 |
| CONAFLEX 0485658 · TMA275848 | H.L. BLACHFORD, LTD./LTEE. | 17 Rubber | Registered | 1983 |
| CONOFLOW 0286390 · TMA143548 | ITT Manufacturing Enterprises LLC | 7 Machines | Registered | 1966 |
| CONIFLEX 0231394 · TMA105043 | an individual | 7 Machines12 Vehicles | Registered | 1956 |
| CONPILOT 2369572 · design | Conprofe Technology Group Co. Ltd. | 7 Machines | Pending | 2024 |
| COINFLIP 2295611 · design | GPD Holdings, LLC | 9 Electronics35 Advertising36 Finance+1 | Pending | 2023 |
| COINFLIP 2295609 | GPD Holdings, LLC | 9 Electronics35 Advertising36 Finance+1 | Pending | 2023 |
| CONBLADE 2258856 | United Salon Technologies GmbH | 8 Hand | Pending | 2023 |
| CANPLANT 2047723 | an individual | 38 Telecommunications40 Treatment41 Education+2 | Pending | 2020 |
| CONFILETAS 1670970 · TMA923724 | an individual | 30 Coffee | Registered | 2015 |
| COMPLAN 1973214 · TMA1267720 | Complan Foods Limited | 5 Pharmaceuticals | Registered | 2024 |