| COMTEC 1985153 | 102045458 Saskatchewan Inc. | 6 Metal7 Machines19 Building+1 | Pending | 2019 |
| coomatec 2093031 · TMA1172441 | Shenzhen Abilee Technology Co. Ltd. | 10 Medical | Registered | 2023 |
| COMETECH 2274098 | Comtech Telecommunications Corp. | 9 Electronics35 Advertising38 Telecommunications+1 | Pending | 2023 |
| CONTEC 1948626 · TMA1148335 · design | CONTEC MEDICAL SYSTEMS CO. LTD. | 10 Medical | Registered | 2022 |
| CANOTEC 1886513 · TMA1064550 · design | Canotec Hydraulic Equipment Co. Ltd. | 7 Machines9 Electronics12 Vehicles+2 | Registered | 2019 |
| COMTECH 1787334 · TMA997606 | COMPRESSION TECHNOLOGY CORPORATION | 4 Oils35 Advertising37 Construction+2 | Registered | 2018 |
| CIMTEC 1653360 · TMA893440 · design | Centre for Imaging Technology Commercialization | 9 Electronics10 Medical35 Advertising+3 | Registered | 2015 |
| COUNTEC 1642682 · TMA944868 · design | Countec Co. Ltd. Korean Corporation | 7 Machines | Registered | 2016 |
| CONTEC 1366039 · TMA745544 | NUTRIEN (CANADA) HOLDINGS ULC | 1 Chemicals | Registered | 2009 |
| CONTEC 1343357 · TMA747099 | NRW Anlagentechnik GmbH | 7 Machines11 Lighting | Registered | 2009 |
| CIMATEC 1109859 · TMA638928 | InnerEco Environmental Inc. | 11 Lighting | Registered | 2005 |
| CONTEC 0772189 · TMA456842 · design | CONTEC CO. LTD. | 5 Pharmaceuticals9 Electronics | Registered | 1996 |
| COMMTEX 0706813 · TMA431411 | Akzo Nobel Coatings Ltd. | 2 Paints8 Hand20 Furniture+3 | Registered | 1994 |
| COMTECH 2274105 · design | Comtech Telecommunications Corp. | 9 Electronics35 Advertising38 Telecommunications+1 | Pending | 2023 |
| COMETES 2241874 | Owner not listed | 41 Education44 Medical | Pending | 2023 |
| COMTAC 2202100 | 3M Company | 9 Electronics | Pending | 2022 |
| CIMETECH 2256049 · TMA1237812 | Groupe Gestion Onsteel Inc. | 37 Construction42 Science | Registered | 2024 |
| CEMOTOCN 2214353 · TMA1244390 | CEMOTO LTD | 12 Vehicles | Registered | 2024 |
| COMMODEX 0541062 · TMA313536 | EQUIDEX INCORPORATED | 35 Advertising36 Finance41 Education | Registered | 1986 |
| cimetech 2199789 | Shenzhen Chunqiu Electronic Technology Co. Ltd. | 9 Electronics11 Lighting | Pending | 2022 |
| COAMATIC 2060352 | INSTRUMENTATION LABORATORY COMPANY | 1 Chemicals5 Pharmaceuticals | Pending | 2020 |
| CMTECK 2121116 · TMA1186428 | Shenzhen Zhimeitai Technology Co. Ltd. | 9 Electronics | Registered | 2023 |
| CINtec 2042786 · TMA1107581 | Roche Diagnostics GmbH | 5 Pharmaceuticals42 Science | Registered | 2021 |
| CWINTEC 1885565 · TMA1105475 · design | QINGDAO WINTEC SYSTEM CO. LTD. | 9 Electronics | Registered | 2021 |
| CYMODIC 1831451 · TMA1069230 | PFIZER INC. | 5 Pharmaceuticals | Registered | 2020 |