| ComboCard 0907635 | HER MAJESTY THE QUEEN IN RIGHT OF ONTARIO AS REPRESENTED BY THE MINISTRY OF TRANSPORTATION | All goods and services | Protected | 1995 |
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| COMBOCORE 2344758 | Owner not listed | 42 Science | Pending | 2024 |
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| COMBOCURVE 2212057 · TMA1243060 | ComboCurve, Inc. | 42 Science | Registered | 2024 |
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| ComboCap 1864579 · TMA1094473 | ComboCap, Inc. | 5 Pharmaceuticals40 Treatment | Registered | 2021 |
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| CONVOCARE 1810062 · TMA1054898 | CONVOTHERM Elektrogeräte GmbH | 1 Chemicals3 Cosmetics | Registered | 2019 |
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| COMPCARE 1225123 · TMA676004 | Goodman Manufacturing Company, L.P. (a Texas corporation) | 36 Finance | Registered | 2006 |
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| COMBOCARBON 2243721 · TMA1243400 | Owner not listed | 42 Science | Registered | 2024 |
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| combiscale 1136538 · TMA608747 | PAX IP INC. | 7 Machines | Registered | 2004 |
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| COMBOSAVER 1097368 · TMA582156 | ACCO Brands Corporation | 6 Metal | Registered | 2003 |
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| COMBOCLIP 2045563 · TMA1183571 · design | Hangzhou AGS MedTech Co. Ltd. | 10 Medical | Registered | 2023 |
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| CONFYCARE 1824117 · TMA1000059 · design | HUANGSHAN JINFU MEDICAL EQUIPMENT CO. LTD | 10 Medical | Registered | 2018 |
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| COMBISAFE 1740081 · TMA1008757 | an individual | 6 Metal16 Paper17 Rubber+1 | Registered | 2018 |
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| COMPOSURE 1439841 · TMA778135 | an individual | 10 Medical | Registered | 2010 |
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| COMBISAFE 1325095 · TMA785262 | an individual | 6 Metal37 Construction41 Education+1 | Registered | 2010 |
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| COMPUCAGE 0881526 · TMA547662 | Compucage International Inc. | 9 Electronics20 Furniture | Registered | 2001 |
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| CONVACARE 0728164 · TMA458265 | ConvaTec Inc. | 3 Cosmetics | Registered | 1996 |
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| COMBOCOOL 2325013 | Owner not listed | 20 Furniture24 Textiles | Pending | 2024 |
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| COMPOSURE 2282551 | FoodScience, LLC | 5 Pharmaceuticals | Pending | 2023 |
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| COMPOSECURE 1990732 · TMA1100416 | an individual | 9 Electronics16 Paper40 Treatment+1 | Registered | 2021 |
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| COMPOSICORE 1362564 · TMA833419 | Barrette Outdoor Living, Inc | 19 Building | Registered | 2012 |
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| CAMPUSCARE 1210032 · TMA633104 | Campus Management Corp, a legal entity | 42 Science | Registered | 2005 |
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| CAMPUSCARE 1182568 · TMA659128 | CANAM INSURANCE SERVICES (2018) LIMITED | 36 Finance | Registered | 2006 |
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| COMPUSCALE 0452747 · TMA251049 | Siemens Milltronics Process Instruments Inc. | 7 Machines9 Electronics | Registered | 1980 |
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| COMBOSYNC 2243877 · TMA1243402 | Owner not listed | 42 Science | Registered | 2024 |
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| COMPOZITE 2005346 · TMA1108299 | Oz Lifting Products, LLC | 7 Machines | Registered | 2021 |
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