| CASTINE 2190348 · TMA1158457 | KOHLER CO. | 11 Lighting | Registered | 2022 |
| CAYSTON 1446906 · TMA781104 · design | GILEAD SCIENCES, INC., A DELAWARE CORPORATION | 5 Pharmaceuticals | Registered | 2010 |
| CAYSTON 1244456 · TMA755590 | GILEAD SCIENCES, INC., A DELAWARE CORPORATION | 5 Pharmaceuticals | Registered | 2009 |
| Costonome 1998774 · TMA1125784 | an individual | 16 Paper41 Education42 Science | Registered | 2022 |
| CASIOTONE 0440505 · TMA264836 | CASIO KEISANKI KABUSHIKI KAISHA TRADING AS CASIO COMPUTER CO. LTD. | 15 Musical28 Toys | Registered | 1981 |
| CYSTINOL 1498332 · TMA887906 | SCHAPER & BRUMMER GMBH & CO. KG | 5 Pharmaceuticals | Registered | 2014 |
| CASTAÑER 1459401 · TMA802489 · design | Owner not shown | 18 Leather25 Clothing | Registered | 2011 |
| CASTANET 1307380 · TMA711781 | Castanet Holdings Limited Partnership | 35 Advertising38 Telecommunications41 Education | Registered | 2008 |
| custonow 2343206 | Henan Haichao Home Co. Ltd. | 20 Furniture | Pending | 2024 |
| CASTANET 2037266 | Thinktum Inc. | 42 Science | Pending | 2020 |
| CUSTOMTUNE 2192154 · TMA1234811 | BOSE CORPORATION | 9 Electronics | Registered | 2024 |
| CustomNext 1816353 · TMA1006521 | Ambry Genetics Corporation, a legal entity | 44 Medical | Registered | 2018 |
| CHOCKSTONE 1185369 · TMA694217 | Chockstone, Inc. | 35 Advertising36 Finance | Registered | 2007 |
| CUSTOMLINE 0734633 · TMA439168 | DASHWOOD INDUSTRIES LIMITED | 19 Building | Registered | 1995 |
| CUSTOMLINE 0623568 · TMA365046 | The Chesterfield Shop (Ontario) Ltd. | 11 Lighting20 Furniture | Registered | 1990 |
| CUSTOMLINE 0501907 · TMA307792 | CertainTeed Ceilings Corporation | 6 Metal19 Building | Registered | 1985 |
| CASDON 2077301 · TMA1203846 | Casdon Limited | 16 Paper20 Furniture28 Toys | Registered | 2023 |
| CAXTON 2001592 · TMA1146510 · design | an individual | 15 Musical | Registered | 2022 |
| CUSTOM 1748836 · TMA1058061 · design | Unilever Global IP Limited | 3 Cosmetics44 Medical | Registered | 2019 |
| CUSTOM 1392199 · TMA757790 · design | Hydrolico International Inc. | 7 Machines | Registered | 2010 |
| CASTAÑO 1323590 · TMA730445 · design | an individual | 32 Beer33 Wine35 Advertising | Registered | 2008 |
| CUSTOM 1293351 · TMA714992 · design | an individual | 9 Electronics | Registered | 2008 |
| CAXTON 1266536 · TMA679181 | KOHLER CO. a corporation organized and existing under the laws of the State of Wisconsin | 11 Lighting | Registered | 2007 |
| CUSTOM 1212594 · TMA640477 | Custom Building Products, Inc. | 1 Chemicals2 Paints3 Cosmetics+4 | Registered | 2005 |
| CUSTOM 1067365 · TMA565249 · design | YAMAHA CORPORATION A LEGAL ENTITY | 15 Musical | Registered | 2002 |