| CONFOCHIMERA 2171676 | an individual | 1 Chemicals42 Science | Pending | 2022 |
| CONVOCHILL 1474868 · TMA804807 | The Delfield Company LLC | 11 Lighting | Registered | 2011 |
| CONFOSENSOR 1980575 · TMA1111243 | an individual | 1 Chemicals | Registered | 2021 |
| CONFOSCREEN 1980574 · TMA1111242 | an individual | 1 Chemicals | Registered | 2021 |
| CONFECTIOUS 1905109 · TMA1105568 | Amazon Technologies, Inc. | 30 Coffee | Registered | 2021 |
| CONFYCARE 1824117 · TMA1000059 · design | HUANGSHAN JINFU MEDICAL EQUIPMENT CO. LTD | 10 Medical | Registered | 2018 |
| CONVOCARE 1810062 · TMA1054898 | CONVOTHERM Elektrogeräte GmbH | 1 Chemicals3 Cosmetics | Registered | 2019 |
| CONFUCIUS 1312136 · TMA747065 · design | DEVELOPMENT CENTER FOR TEACHING CHINESE AS A FOREIGN LANGUAGE OF THE MINISTRY OF EDUCATION P.R.C. | 16 Paper41 Education | Registered | 2009 |
| CONFECSHURE 1061563 · TMA575109 | BALCHEM CORPORATION, a corporation of MARYLAND | 30 Coffee | Registered | 2003 |
| CONFIXOR 0676404 · TMA399927 | AVEDA CORPORATION | 3 Cosmetics | Registered | 1992 |
| CONFOGEN 2352051 | an individual | 1 Chemicals5 Pharmaceuticals35 Advertising+1 | Pending | 2024 |
| CNMOFAXIN 2262491 · TMA1281390 | Guangdong Xinyingrong Pharmaceutical Technology Co. Ltd. | 3 Cosmetics | Registered | 2025 |
| Chmibasu 2257954 · TMA1277717 | Tongcheng Haoying E-Commerce Center | 28 Toys | Registered | 2024 |
| CMHFKKG 2252798 · TMA1271502 | Shanghai Buzhi Gardening Co. Ltd. | 21 Housewares | Registered | 2024 |
| COMPOSTABLES 2243961 · TMA1263143 · design | Owner not listed | 8 Hand16 Paper21 Housewares | Registered | 2024 |
| COMBOSYNC 2243877 · TMA1243402 | Owner not listed | 42 Science | Registered | 2024 |
| COMBOCARBON 2243721 · TMA1243400 | Owner not listed | 42 Science | Registered | 2024 |
| Canfacture 2233501 · TMA1261390 | an individual | 35 Advertising | Registered | 2024 |
| CompHost 2219156 · TMA1230725 | an individual | 40 Treatment | Registered | 2024 |
| CONFIXX 2215634 · TMA1233962 | an individual | 1 Chemicals | Registered | 2024 |
| COMBOCURVE 2212057 · TMA1243060 | ComboCurve, Inc. | 42 Science | Registered | 2024 |
| CONVÉS 2209934 · TMA1230650 | Owner not shown | 33 Wine | Registered | 2024 |
| COMPOST 2208633 · TMA1225514 | Eco Tan Pty Ltd | 3 Cosmetics | Registered | 2024 |
| CAMPSIITE 2208478 · TMA1228468 | REGENXBIO Inc. | 42 Science | Registered | 2024 |
| Canopus 2199973 · TMA1237640 | CANOPUS GROUP LLC | 8 Hand | Registered | 2024 |