| OSNO 2265566 · TMA1284961 | 3097-1238 Quebec Inc. | 25 Clothing35 Advertising | Registered | 2025 |
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| OKAN 2171628 · TMA1169173 | SAULE LLC | 9 Electronics | Registered | 2023 |
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| OCEANO 2159991 · TMA1285122 · design | Owner not shown | 16 Paper18 Leather21 Housewares+5 | Registered | 2025 |
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| OKANE 1805953 · TMA998484 | OKANE SUSHI GROUP INC. | 18 Leather25 Clothing29 Meat+2 | Registered | 2018 |
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| OCSAN 0971456 | NORTH ATLANTIC SALMON CONSERVATION ORGANIZATION / ORGANISATION POUR LA CONSERVATION DU SAUMON DE L'ATLANTIQUE DU NORD | All goods and services | Protected | 2002 |
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| okany 2266811 | Owner not listed | 5 Pharmaceuticals | Pending | 2023 |
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| OKANE 2075532 · design | M.A. O'Kane Consultants Inc. | 9 Electronics35 Advertising36 Finance+4 | Pending | 2021 |
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| OKANE 2075531 | M.A. O'Kane Consultants Inc. | 9 Electronics35 Advertising36 Finance+4 | Pending | 2021 |
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| OKAWANY 2149007 · TMA1203133 · design | an individual | 18 Leather | Registered | 2023 |
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| OZANI 2249197 · TMA1267376 | an individual | 14 Jewellery35 Advertising | Registered | 2024 |
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| Océane 2208012 · TMA1248183 | MX PRODUCTS INC | 7 Machines11 Lighting | Registered | 2024 |
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| OSSEAN 2117455 · TMA1184149 | Evollution IP Holdings, Inc. | 10 Medical | Registered | 2023 |
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| Okona 2095271 · TMA1174772 | 15331331 Canada Inc. | 18 Leather22 Ropes24 Textiles+2 | Registered | 2023 |
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| Oson 2093858 · TMA1171433 | an individual | 25 Clothing | Registered | 2023 |
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| ozeino 2079843 · TMA1178959 | Shenzhen Anyuan Trading Co. Ltd. | 9 Electronics | Registered | 2023 |
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| OSMO 2067994 · TMA1211663 | Professional Beauty Systems Limited | 3 Cosmetics | Registered | 2023 |
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| OCEAN 2056861 · TMA1283950 | Azul 3D, Inc. | 7 Machines40 Treatment | Registered | 2025 |
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| OCAN 2002001 · TMA1131558 | an individual | 5 Pharmaceuticals | Registered | 2022 |
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| OCEAN 1999509 · TMA1117475 · combined | Hawaii Sea Spirits, LLC | 33 Wine | Registered | 2022 |
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| OSN 1979731 · TMA1245917 · design | Precision Medicine Group, LLC | 42 Science | Registered | 2024 |
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| OCIANA 1961907 · TMA1224803 | Global Spatial Technology Solutions Inc. | 36 Finance42 Science | Registered | 2024 |
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| OKANUI 1931174 · TMA1117660 | OK Invest Pty Ltd as trustee for Okanui IP Unit Trust | 25 Clothing | Registered | 2022 |
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| OKGN 1922461 · TMA1106448 | Okanagan Lifestyle Apparel Inc. | 9 Electronics14 Jewellery16 Paper+16 | Registered | 2021 |
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| OCEAN 1899885 · TMA1088412 | Hawaii Sea Spirits, LLC | 33 Wine | Registered | 2020 |
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| OCANA 1885883 · TMA1094989 | Grand Health Inc. | 5 Pharmaceuticals | Registered | 2021 |
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