| WESTROSE 1858498 · TMA1017102 | 9359-4547 QUÉBEC INC. | 30 Coffee35 Advertising43 Restaurants | Registered | 2019 |
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| Westrely 2352350 | an individual | 24 Textiles | Pending | 2024 |
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| WesTrip 0881706 · TMA530497 | SURE-TRIP INC. | 9 Electronics | Registered | 2000 |
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| WESTRAN 0876674 · TMA518986 | WESTRAN SERVICES LIMITED | 36 Finance39 Transport | Registered | 1999 |
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| WestRiver 2083278 · TMA1167068 | an individual | 11 Lighting | Registered | 2023 |
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| WESTERLY 2055958 · TMA1182441 | RESIDENCES OF WESTERLY INC. | 36 Finance37 Construction42 Science | Registered | 2023 |
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| WESTERLY 1985010 · TMA1135492 | AS America, Inc. | 11 Lighting | Registered | 2022 |
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| WESTROCK 1732931 · TMA964492 · design | WESTROCK SHARED SERVICES, LLC | 1 Chemicals6 Metal7 Machines+7 | Registered | 2017 |
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| WESTROCK 1726903 · TMA956436 | WESTROCK SHARED SERVICES, LLC | 1 Chemicals6 Metal7 Machines+7 | Registered | 2016 |
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| WESTRAND 1554705 · TMA844315 · design | FINANCIERE WESTRAND une société à responsabilité limitée | 1 Chemicals3 Cosmetics4 Oils+3 | Registered | 2013 |
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| WESTERRA 1526433 · TMA822060 | an individual | 37 Construction | Registered | 2012 |
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| WESTROCK 1479097 · TMA843465 | Westrock Diamonds Inc. | 14 Jewellery25 Clothing35 Advertising+4 | Registered | 2013 |
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| WESTOWER 1010866 · TMA543070 | Wes Tower Communications Ltd. | 36 Finance37 Construction39 Transport+1 | Registered | 2001 |
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| WESTERNU 0921616 | THE UNIVERSITY OF WESTERN ONTARIO | All goods and services | Protected | 2012 |
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| WESTEARNER 1154964 · TMA599356 | CANADIAN WESTERN BANK | 36 Finance | Registered | 2004 |
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| WESTRUMITE. 0990157 · NFLD157 | an individual | 3 Cosmetics | Registered | 1903 |
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| WESTAR 1794777 · TMA1019378 | WESTAR DISTRIBUTION, LLC | 35 Advertising39 Transport | Registered | 2019 |
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| WESTERN 1380293 · TMA792483 | DOUGLAS DYNAMICS, LLC (a Delaware Limited Liability Company) | 7 Machines8 Hand | Registered | 2011 |
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| WESTOR 1371317 · TMA738779 · design | Ag Growth International Inc. | 6 Metal | Registered | 2009 |
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| WESTOR 1371315 · TMA738780 | Ag Growth International Inc. | 6 Metal | Registered | 2009 |
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| WESTAR 1328673 · TMA706076 | WEST PHARMACEUTICAL SERVICES, INC. | 6 Metal17 Rubber20 Furniture+1 | Registered | 2008 |
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| WESTERN 0903775 | THE BOARD OF GOVERNORS, THE UNIVERSITY OF WESTERN ONTARIO | All goods and services | Protected | 1989 |
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| WESTAR 0623420 · TMA424446 | SANDGATE LTD. | 14 Jewellery | Registered | 1994 |
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| WESTERN 0505942 · TMA292655 · design | WESTERN PIZZA & BAR-B-Q CHICKEN (1979) LTD. | 29 Meat30 Coffee | Registered | 1984 |
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| WESTERN 0304217 · TMA154999 · design | OLIN CORPORATION | 13 Firearms21 Housewares28 Toys | Registered | 1968 |
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