| Dr6ix 2159063 · TMA1209992 | Dr. Martin Jugenburg Medical Professional Corporation | 44 Medical | Registered | 2023 |
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| DRX 2261739 · TMA1281273 · design | DRX BIOTECH INTERNATIONAL COMPANY LIMITED | 3 Cosmetics | Registered | 2025 |
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| DRAX 2154229 · TMA1275722 · design | Drax Corporate Limited | 1 Chemicals4 Oils6 Metal+13 | Registered | 2024 |
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| DRAX 2101680 · TMA1275632 | Drax Corporate Limited | 1 Chemicals4 Oils6 Metal+12 | Registered | 2024 |
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| DRX 1931176 · TMA1148521 | DISPOSERX, INC. | 1 Chemicals41 Education | Registered | 2022 |
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| Doerix 2042218 · TMA1143759 | GUANGZHOU HONGDIXING Textile Co. Ltd. | 25 Clothing | Registered | 2022 |
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| DUREX 2170098 · TMA1274085 · design | LRC Products Limited | 3 Cosmetics5 Pharmaceuticals10 Medical | Registered | 2024 |
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| DUREX 1951687 · TMA1146168 · design | LRC Products Limited | 5 Pharmaceuticals10 Medical | Registered | 2022 |
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| DUREX 1908303 · TMA1093904 | Mid-States Distributing, LLC | 1 Chemicals | Registered | 2021 |
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| dTrax 1901352 · TMA1102302 | DELOITTE LLP | 9 Electronics | Registered | 2021 |
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| DUREX 1776465 · TMA1037202 · design | LRC Products Limited | 5 Pharmaceuticals10 Medical | Registered | 2019 |
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| DORIS 1704859 · TMA940853 | 2128933 Alberta Ltd. | 30 Coffee | Registered | 2016 |
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| DORIC 1697485 · TMA918688 · design | KRINOS FOODS CANADA LTD. | 29 Meat | Registered | 2015 |
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| DORIC 1697471 · TMA919474 | KRINOS FOODS CANADA LTD. | 29 Meat | Registered | 2015 |
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| DUREX 1596064 · TMA995212 · design | LRC Products Limited | 3 Cosmetics5 Pharmaceuticals10 Medical+1 | Registered | 2018 |
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| DORIC 1562140 · TMA843032 | DORIC PRODUCTS, INC. | 1 Chemicals6 Metal19 Building+3 | Registered | 2013 |
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| DORIC 1562139 · TMA843031 · design | DORIC PRODUCTS, INC. | 1 Chemicals6 Metal19 Building+3 | Registered | 2013 |
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| DUREX 1535560 · TMA1034624 | LRC Products Limited | 25 Clothing | Registered | 2019 |
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| DORYX 1503303 · TMA824890 | Mayne Pharma International Pty Ltd | 5 Pharmaceuticals | Registered | 2012 |
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| DORIC 1263922 · TMA666428 | LES LENTILLES DORIC INC. / DORIC LENSES INC. | 35 Advertising40 Treatment42 Science | Registered | 2006 |
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| DryOx 1257534 · TMA685314 | CARMEUSE LIME (CANADA) LIMITED | 19 Building | Registered | 2007 |
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| DERIS 1204630 · TMA673843 · design | DERIS PATENTS & TRADEMARKS AGENCY JOINT-STOCK COMPANY, a legal entity | 9 Electronics16 Paper35 Advertising+4 | Registered | 2006 |
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| DOREX 1144299 · TMA607479 · design | DOREX PRODUCTS INC. | 6 Metal7 Machines9 Electronics+2 | Registered | 2004 |
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| DUREX 1009066 · TMA545074 · design | LRC Products Limited | 1 Chemicals5 Pharmaceuticals10 Medical | Registered | 2001 |
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| DIRIS 0860032 · TMA534528 | SOCOMEC (SA) | 9 Electronics35 Advertising37 Construction+2 | Registered | 2000 |
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