| FUNCTIONAL 45 1781102 · TMA971954 | F45 Training Canada Limited | 41 Education | Registered | 2017 |
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| FUNCTIONAL FUEL 2086835 · TMA1168791 | 2673939 ONTARIO LTD | 5 Pharmaceuticals | Registered | 2023 |
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| FUNCTIONAL GOLF 2119897 · design | an individual | 9 Electronics41 Education | Pending | 2021 |
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| FUNCTIONAL MEALS 1975144 | Clean Meals Inc. | 29 Meat | Pending | 2019 |
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| QUADRA-FUNCTIONAL 1918861 · TMA1094054 | Hendrickson USA, L.L.C. a Delaware Limited Liability Company | 12 Vehicles | Registered | 2021 |
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| fit and functional 2223438 · TMA1249969 | The Training Loft Ltd. | 44 Medical | Registered | 2024 |
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| FUNCTIONAL STYLE 8 2176226 · TMA1207912 | F45 Training Holdings Inc. | 41 Education | Registered | 2023 |
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| FUNCTIONAL SYNERGY 1643657 · TMA949030 | Functional Synergy Inc. | 9 Electronics16 Paper25 Clothing+6 | Registered | 2016 |
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| FUNCTIONAL FLAVOUR 1599015 · TMA911611 | Overnight Recovery Brands Ltd. | 5 Pharmaceuticals16 Paper29 Meat+2 | Registered | 2015 |
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| FUNCTIONAL GOURMET 1232013 · TMA655103 · design | FGF Brands Inc. | 30 Coffee35 Advertising40 Treatment | Registered | 2005 |
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| SF SKIN FUNCTIONAL 2313410 · design | SKIN FUNCTIONAL (PTY) LTD | 3 Cosmetics | Pending | 2024 |
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| FUN AND FUNCTIONAL 2102467 | Herbaland Naturals Inc. | 5 Pharmaceuticals30 Coffee35 Advertising | Pending | 2021 |
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| Functional Ferments 2095712 | Functional Ferments Inc. | 35 Advertising41 Education43 Restaurants | Pending | 2021 |
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| FUNCTIONAL FORMULAS 1981148 | Fresco Enterprises LLC | 3 Cosmetics5 Pharmaceuticals | Pending | 2019 |
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| FUNCTIONAL ISOLATION 2136396 | Xerosguard Inc. | 44 Medical | Pending | 2021 |
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| MERIT FUNCTIONAL FOODS 2003979 · TMA1260612 · design | Merit Functional Foods Corporation | 35 Advertising40 Treatment | Registered | 2024 |
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| Merit Functional Foods 2003977 · TMA1257488 | Merit Functional Foods Corporation | 35 Advertising40 Treatment | Registered | 2024 |
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| FUNCTIONAL DEVICES, INC. 1974180 · TMA1257272 · design | Functional Devices, LLC, an Indiana Limited Liability Company | 9 Electronics | Registered | 2024 |
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| FUNCTIONAL FORMULARIES 1693908 · TMA920666 | Nutritional Medicinals LLC | 5 Pharmaceuticals | Registered | 2015 |
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| HEALTH FUNCTIONAL FOOD 0972598 · design | REPUBLIC OF KOREA / RÉPUBLIQUE DE CORÉE | All goods and services | Protected | 2010 |
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| FUNCTIONAL INTEGRATION 0533294 · TMA322472 | The Feldenkrais Guild of North America, an Oregon not-for-profit corporation | 9 Electronics16 Paper35 Advertising+1 | Registered | 1987 |
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| FUNCTIONAL NUTRITIONALS 1980933 | Fresco Enterprises LLC | 3 Cosmetics5 Pharmaceuticals | Pending | 2019 |
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| FUNCTIONAL RANGE RELEASE 1518078 · TMA829132 | an individual | 41 Education44 Medical | Registered | 2012 |
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| THE FUTURE IS FUNCTIONAL 2362257 | The Institute for Functional Medicine | 9 Electronics41 Education | Pending | 2024 |
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| DOSHA CO. FUNCTIONAL COFFEE 2105402 · TMA1177617 · design | 1199224 B.C. Ltd. | 30 Coffee | Registered | 2023 |
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