| ALLAS 2039910 · TMA1189157 | an individual | 11 Lighting37 Construction41 Education+3 | Registered | 2023 |
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| ALAS 1270230 · TMA738991 | Attorneys Liability Assurance Society, Inc. a Risk Retention Group | 36 Finance | Registered | 2009 |
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| ALIS 0924552 · design | Her Majesty the Queen in Right of Alberta as represented by the Minister of Community and Social Services | All goods and services | Protected | 2017 |
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| ALIS 0924551 · design | Her Majesty the Queen in Right of Alberta as represented by the Minister of Community and Social Services | All goods and services | Protected | 2017 |
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| ALIS 0924550 · design | Her Majesty the Queen in Right of Alberta as represented by the Minister of Community and Social Services | All goods and services | Protected | 2017 |
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| ALIS 0910763 | HER MAJESTY THE QUEEN IN RIGHT OF THE PROVINCE OF ALBERTA, AS REPRESENTED BY THE MINISTER OF ADVANCED EDUCATION AND CAREER DEVELOPMENT | All goods and services | Protected | 1999 |
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| ALOAS 0907189 | HER MAJESTY'S CANADIAN FORCES, DEPARTMENT OF NATIONAL DEFENCE | All goods and services | Protected | 1995 |
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| ALAS 0897108 · TMA538932 | Attorneys Liability Assurance Society, Inc. a Risk Retention Group | 16 Paper36 Finance41 Education | Registered | 2000 |
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| ALAS 0720326 · TMA433402 | an individual | 9 Electronics16 Paper41 Education+2 | Registered | 1994 |
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| ALIS 2170214 · design | an individual | 9 Electronics42 Science | Pending | 2022 |
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| ALIASCX 2192101 | 24-7 Intouch Inc. | 9 Electronics35 Advertising42 Science | Pending | 2022 |
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| ALWAYS 2188616 · TMA1175284 · design | The Procter & Gamble Company | 5 Pharmaceuticals | Registered | 2023 |
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| ALISSE 2084078 · TMA1204920 | LUTRON ELECTRONICS CO., INC. | 9 Electronics | Registered | 2023 |
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| ALWAYS 2002972 · TMA1154864 · design | The Procter & Gamble Company | 5 Pharmaceuticals | Registered | 2022 |
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| ALWAYS 2002968 · TMA1154863 · design | The Procter & Gamble Company | 5 Pharmaceuticals | Registered | 2022 |
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| ALISSA 1817403 · TMA1043757 | Agilent Technologies, Inc. | 42 Science | Registered | 2019 |
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| ALWAYS 1685081 · TMA916340 | The Procter & Gamble Company | 5 Pharmaceuticals | Registered | 2015 |
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| ALWAYS 1625809 · TMA899552 · design | The Procter & Gamble Company | 5 Pharmaceuticals | Registered | 2015 |
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| ALIAGE 1251445 · TMA665681 | ESTEE LAUDER COSMETICS LTD. | 3 Cosmetics | Registered | 2006 |
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| ALWAYS 1210053 · TMA681913 · design | The Procter & Gamble Company | 3 Cosmetics5 Pharmaceuticals | Registered | 2007 |
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| ALWAYS 1004169 · TMA527772 | The Procter & Gamble Company | 5 Pharmaceuticals | Registered | 2000 |
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| ALLIES 0907986 | HER MAJESTY'S CANADIAN FORCES, DEPARTMENT OF NATIONAL DEFENCE | All goods and services | Protected | 1996 |
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| ALWAYS 0756168 · TMA464939 | Walmart Apollo, LLC | 35 Advertising | Registered | 1996 |
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| ALWAYS 0714024 · TMA419910 | Coca-Cola Ltd. | 32 Beer35 Advertising | Registered | 1993 |
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| ALWAYS 0489107 · TMA290188 | The Procter & Gamble Company | 5 Pharmaceuticals | Registered | 1984 |
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