| OUTGO 2247499 | Owner not listed | 35 Advertising36 Finance42 Science | Pending | 2023 |
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| ODIGO 2168359 · TMA1284350 · design | ODIGO | 9 Electronics38 Telecommunications42 Science | Registered | 2025 |
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| ODIGO 1852308 · TMA1117651 | ODIGO | 9 Electronics38 Telecommunications42 Science | Registered | 2022 |
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| OTICO 1762038 · TMA975239 | Owner not shown | 7 Machines11 Lighting12 Vehicles+1 | Registered | 2017 |
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| OTOGO 2072790 | Owner not shown | 9 Electronics12 Vehicles35 Advertising+1 | Pending | 2020 |
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| OUTDECO 1713976 · TMA989208 | Cirtex Group Holdings Limited | 6 Metal19 Building20 Furniture | Registered | 2018 |
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| OUTWISE 2169802 | LocalIntel Inc. | 9 Electronics39 Transport42 Science | Pending | 2022 |
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| Outus 2226069 · TMA1251285 | SHENZHEN JUANJING NETWORK TECHNOLOGY CO., LTD. | 16 Paper | Registered | 2024 |
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| OTSO 2221581 · TMA1239045 | OTSO CYCLES, LLC | 12 Vehicles | Registered | 2024 |
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| OUTASK 2203845 · TMA1239969 · design | Shenzhen Habitat Technology Co., Ltd. | 11 Lighting | Registered | 2024 |
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| OTG 1835242 · TMA1020662 | FLEXOVIT USA, INC. | 7 Machines | Registered | 2019 |
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| OATIS 1821971 · TMA1019197 | an individual | 29 Meat30 Coffee | Registered | 2019 |
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| OTIS 1811667 · TMA1017718 · design | Otis Products, Inc. dba Otis Technology, Inc. | 1 Chemicals4 Oils8 Hand+4 | Registered | 2019 |
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| OTIS 1630126 · TMA939071 | TForce Holdings Inc. | 35 Advertising | Registered | 2016 |
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| OTISS 1573169 · TMA857730 | TRANSOFT SOLUTIONS INC. | 39 Transport42 Science | Registered | 2013 |
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| OTG 1542568 · TMA845967 | OTG Experience, LLC | 9 Electronics20 Furniture35 Advertising+3 | Registered | 2013 |
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| OUTDOG 1380542 · TMA741551 · design | DECATHLON, SA | 9 Electronics18 Leather21 Housewares+2 | Registered | 2009 |
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| OTIS 1184152 · TMA670295 | Aspire Bakeries LLC | 30 Coffee | Registered | 2006 |
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| OTG 1158329 · TMA609027 | EDUCATORS FINANCIAL GROUP INC. | 36 Finance | Registered | 2004 |
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| OUTS 1064320 · TMA562970 | TEND SKIN INTERNATIONAL, INC. a legal entity | 3 Cosmetics | Registered | 2002 |
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| OTIS 0991691 · NFLD1691 · design | OTIS ELEVATOR COMPANY | 7 Machines9 Electronics16 Paper+1 | Registered | 1929 |
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| OTIS 0991379 · NFLD1379 | OTIS ELEVATOR COMPANY | 7 Machines9 Electronics13 Firearms+2 | Registered | 1926 |
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| OUTECH 0723419 · TMA422059 | Canadian Tire Corporation, Limited | 25 Clothing | Registered | 1994 |
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| OTIS 0573185 · TMA345741 | OTIS ELEVATOR COMPANY (A NEW JERSEY CORPORATION) | 37 Construction | Registered | 1988 |
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| OTECO 0485484 · TMA274501 · design | OTECO, INC. (A TEXAS CORPORATION) | 7 Machines9 Electronics12 Vehicles+3 | Registered | 1982 |
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