| CLAIR 2047690 | Trendly, Inc. | 9 Electronics35 Advertising42 Science | Pending | 2020 |
| CLAIR C 1509249 · TMA853062 · design | Clair Global Corp. | 9 Electronics41 Education42 Science | Registered | 2013 |
| En Clair 2218095 · TMA1196195 | En Clair Service-Conseil Inc. | 9 Electronics16 Paper35 Advertising+3 | Registered | 2023 |
| ST.CLAIR 0372769 · TMA203313 · design | PPG Architectural Coatings Canada, Inc./PPG Revêtements architecturaux Canada, inc. | 2 Paints3 Cosmetics5 Pharmaceuticals+11 | Registered | 1974 |
| ST. CLAIR 0317293 · TMA164518 | PPG Architectural Coatings Canada, Inc./PPG Revêtements architecturaux Canada, inc. | 16 Paper | Registered | 1969 |
| BEE CLAIR 1953838 · TMA1230765 · design | 2005961 Ontario Inc. | 3 Cosmetics | Registered | 2024 |
| RBC CLAIR 2269996 | ROYAL BANK OF CANADA | 9 Electronics35 Advertising36 Finance+1 | Pending | 2023 |
| CLAIR BROS 1509255 · TMA823751 · design | Clair Global Corp. | 9 Electronics41 Education42 Science | Registered | 2012 |
| Saint Clair 1491023 · TMA855537 | LIXIL Corporation | 11 Lighting | Registered | 2013 |
| SAINT CLAIR 1170702 · TMA615728 | Saint Clair Estate Wines Limited | 33 Wine | Registered | 2004 |
| DRAIN-CLAIR 0420050 · TMA237531 | Gainage P.R.S. Inc. | 37 Construction | Registered | 1979 |
| CLAIR-OBSCUR 1854037 · TMA1079870 · design | ARCHIBALD INC. | 32 Beer | Registered | 2020 |
| CLAIR OBSCUR 2372434 | an individual | 9 Electronics41 Education42 Science | Pending | 2024 |
| CLAIR DE LUNE 1882541 · TMA1061800 | Charles Komar & Sons, Inc. | 25 Clothing | Registered | 2019 |
| CLAIR DE ROSE 1518548 · TMA838542 | Montres Tudor SA | 14 Jewellery | Registered | 2012 |
| CRISTAL CLAIR 1409157 · TMA760599 · design | RBF International Ltee | 1 Chemicals3 Cosmetics5 Pharmaceuticals+3 | Registered | 2010 |
| CLAIR DE LUNE 1376191 · TMA740381 | CLAIR DE LUNE PRODUCTS INC. / PRODUITS CLAIR DE LUNE INC. | 3 Cosmetics4 Oils6 Metal+8 | Registered | 2009 |
| Clair de Lune 1283420 · TMA731860 | CLAIR DE LUNE PRODUCTS INC. / PRODUITS CLAIR DE LUNE INC. | 35 Advertising | Registered | 2009 |
| CLAIR CRISTAL 0727815 · TMA431188 | BENJAMIN MOORE & CO. LIMITED | 2 Paints | Registered | 1994 |
| Clair Rainwear 1869527 · TMA1049097 | an individual | 25 Clothing | Registered | 2019 |
| CLAIR DE TEINT 1729467 · TMA960289 | Owner not shown | 3 Cosmetics | Registered | 2017 |
| VERSAFINE CLAIR 1844804 · TMA1057092 | Tsukineko Co. Ltd. a Japan corporation | 16 Paper | Registered | 2019 |
| ST. CLAIR DENTAL 2281510 · design | Dr Jay Niman Dentistry Professional Corporation | 44 Medical | Pending | 2023 |
| ST. CLAIR COLLEGE 2085025 | The St. Clair College of Applied Arts and Technology | 9 Electronics14 Jewellery16 Paper+8 | Pending | 2021 |
| TANGO ON ST. CLAIR 1317745 · TMA749152 | TLN MEDIA GROUP INC. | 9 Electronics14 Jewellery16 Paper+6 | Registered | 2009 |