| Idacoo 2319000 | Les Entreprises Internationales Ida-Co Inc. | 18 Leather21 Housewares25 Clothing | Pending | 2024 |
| IDECO 0242814 · TMA111111 | an individual | 6 Metal7 Machines28 Toys | Registered | 1958 |
| ITACA 1900324 · TMA1092091 · design | Owner not shown | 1 Chemicals2 Paints | Registered | 2021 |
| IDC + 1852183 · TMA1052393 · design | Immanence Integral Dermo Correction Inc. | 3 Cosmetics | Registered | 2019 |
| ITACA 1761326 · TMA1029817 · design | an individual | 3 Cosmetics | Registered | 2019 |
| IDHISO 1748355 · TMA995161 | Celgene Corporation | 5 Pharmaceuticals | Registered | 2018 |
| IDC 1710140 · TMA927791 | IDC Worldsource Insurance Network Inc. | 36 Finance | Registered | 2016 |
| IDAZ09 1706053 · TMA959501 | IDAZ09.PTY.LTD. | 9 Electronics | Registered | 2017 |
| IDC 1677829 · TMA927677 | JULIUS-K9 Zrt. (Limited Company) | 6 Metal14 Jewellery16 Paper+5 | Registered | 2016 |
| IDIS 1597563 · TMA879633 · design | IDIS Co., Ltd. | 7 Machines9 Electronics | Registered | 2014 |
| IDIGI 1465659 · TMA804967 · design | Digi International Inc. a Delaware Corporation | 9 Electronics37 Construction38 Telecommunications+4 | Registered | 2011 |
| IDIGI 1446339 · TMA803204 | Digi International Inc. a Delaware Corporation | 9 Electronics37 Construction40 Treatment+2 | Registered | 2011 |
| ITAXI 1415003 · TMA808341 · design | an individual | 9 Electronics38 Telecommunications | Registered | 2011 |
| IDAS 1395931 · TMA795145 | ICOM INCORPORATED | 9 Electronics | Registered | 2011 |
| IDAS 1395924 · TMA795151 · design | ICOM INCORPORATED | 9 Electronics | Registered | 2011 |
| ID2C 1371820 · TMA759444 · design | Owner not shown | 35 Advertising37 Construction42 Science+1 | Registered | 2010 |
| IDEC 1275053 · TMA725843 · design | IDEC CORPORATION | 7 Machines9 Electronics11 Lighting | Registered | 2008 |
| IDEACA 1090758 · TMA582173 | IDEACA KNOWLEDGE SERVICES LTD. | 35 Advertising | Registered | 2003 |
| IDIS 1035313 · TMA553328 | Evonik Operations GmbH | 2 Paints | Registered | 2001 |
| iDOC 1004558 · TMA540735 | ASTLEY-GILBERT REPROCUCTIONS LTD. | 37 Construction39 Transport40 Treatment+1 | Registered | 2001 |
| IDC 0846754 · TMA535557 | INTERNATIONAL DATA GROUP, INC. | 42 Science | Registered | 2000 |
| ITAC 0577866 · TMA347978 · design | INFORMATION TECHNOLOGY ASSOCIATION OF CANADA/ ASSOCIATION CANADIENNE DE LA TECHNOLOGIE DE L'INFORMATION | 35 Advertising41 Education | Registered | 1988 |
| ITAC 0577863 · TMA347977 | INFORMATION TECHNOLOGY ASSOCIATION OF CANADA/ ASSOCIATION CANADIENNE DE LA TECHNOLOGIE DE L'INFORMATION | 35 Advertising41 Education | Registered | 1988 |
| IDEC 0418691 · TMA233071 | IDEC CORPORATION | 9 Electronics11 Lighting | Registered | 1979 |
| IDEXIA 2307366 | IDEXIA INC. | 35 Advertising42 Science | Pending | 2024 |