| DuOtis 2221404 | Dechra Limited | 5 Pharmaceuticals | Pending | 2022 |
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| DUOTECH 1868664 · TMA1081610 · design | Keter Plastic Ltd. | 21 Housewares | Registered | 2020 |
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| DUOTECH 1825157 · TMA1064806 · design | Keter Plastic Ltd. | 20 Furniture | Registered | 2019 |
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| DUOTECH 1798711 · TMA1050825 · design | Keter Plastic Ltd. | 19 Building | Registered | 2019 |
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| DUOTACK 1612466 · TMA870531 | GESTION SOPREMA CANADA INC. | 1 Chemicals | Registered | 2014 |
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| DUODISC 1488798 · TMA809924 | August Rüggeberg GmbH & Co. KG | 7 Machines | Registered | 2011 |
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| DUOTEX 1909044 · TMA1103752 | LYDALL, INC. | 17 Rubber | Registered | 2021 |
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| DOTC 1856253 · TMA1016095 | DotC United Inc | 9 Electronics35 Advertising38 Telecommunications+1 | Registered | 2019 |
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| DIETICA 0801084 · TMA480336 | DÉVELOPPEMENT INDUSTRIALISATION ET PROMOTION DE TECHNOLOGIES AVANCÉES société par actions simplifiées | 1 Chemicals3 Cosmetics4 Oils+2 | Registered | 1997 |
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| DOTTICO 2334346 | an individual | 9 Electronics | Pending | 2024 |
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| DUTZW 2103486 · TMA1189543 | an individual | 3 Cosmetics | Registered | 2023 |
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| DITEC 1937383 · TMA1144979 | an individual | 6 Metal7 Machines9 Electronics+2 | Registered | 2022 |
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| DOTCH 1935100 · TMA1123791 | TCL Communication Technology Holdings Limited | 9 Electronics | Registered | 2022 |
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| DUETS 1789201 · TMA995385 | Gemini, Inc. | 17 Rubber | Registered | 2018 |
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| doDOC 1756718 · TMA988864 | doDOC Corp. | 42 Science | Registered | 2018 |
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| DUTHAC 1690468 · TMA977785 | MACDONALD & MUIR LIMITED | 33 Wine | Registered | 2017 |
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| DIATEC 1602359 · TMA923179 | Owner not shown | 9 Electronics10 Medical35 Advertising+2 | Registered | 2015 |
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| DIATEC 1562787 · TMA864314 | DIAMED LAB SUPPLIES INC. | 9 Electronics | Registered | 2013 |
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| DIOTAX 1535081 · TMA844290 | CEO International Inc. | 9 Electronics16 Paper35 Advertising+4 | Registered | 2013 |
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| DYTEC 1531008 · TMA845173 · design | NANTONG QIANGSHENG NEW MATERIALS TECHNOLOGY CO. LTD. | 6 Metal9 Electronics10 Medical+1 | Registered | 2013 |
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| DATIX 1459170 · TMA844009 | Datix Limited | 9 Electronics41 Education42 Science | Registered | 2013 |
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| DUTEX 1455224 · TMA780012 | an individual | 20 Furniture | Registered | 2010 |
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| DOTECO 1310892 · TMA745678 · design | an individual | 7 Machines9 Electronics | Registered | 2009 |
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| DETICA 1233151 · TMA781638 | BAE SYSTEMS plc | 9 Electronics16 Paper35 Advertising+4 | Registered | 2010 |
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| DOTS 1112170 · TMA579336 | Tootsie Roll Industries, LLC a Delaware limited liability company | 30 Coffee | Registered | 2003 |
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