| IODEX 1546854 · TMA853346 | Bedessee Imports Ltd. | 3 Cosmetics5 Pharmaceuticals | Registered | 2013 |
| IODEX 0991296 · NFLD1296 | Bedessee Imports Ltd. | 5 Pharmaceuticals | Registered | 1925 |
| IDEX 0651454 · TMA412752 | IDEX CORPORATION | 6 Metal7 Machines20 Furniture | Registered | 1993 |
| IIDEX 0602060 · TMA361562 | Informa Canada Inc. | 35 Advertising36 Finance41 Education | Registered | 1989 |
| IDX 2133571 · TMA1176692 | Identity Theft Guard Solutions, Inc. | 9 Electronics35 Advertising38 Telecommunications+2 | Registered | 2023 |
| IDEXX 1936118 · TMA1088868 · design | IDEXX LABORATORIES, INC. | 1 Chemicals5 Pharmaceuticals9 Electronics+4 | Registered | 2020 |
| IOTEX 1795767 · TMA981991 | IOTEX ANTI-INFECTION PRODUCTS INC./LES PRODUITS ANTI-INFECTIEUX IOTEX INC. | 5 Pharmaceuticals11 Lighting27 Carpets | Registered | 2017 |
| ITEX 1724929 · TMA944914 | ISOLITE GmbH | 17 Rubber | Registered | 2016 |
| IDX 1449136 · TMA803862 | IDX Corporation | 6 Metal19 Building20 Furniture+3 | Registered | 2011 |
| IDEXX 1358625 · TMA746302 | IDEXX LABORATORIES, INC. | 1 Chemicals5 Pharmaceuticals9 Electronics+2 | Registered | 2009 |
| IDEC 1275053 · TMA725843 · design | IDEC CORPORATION | 7 Machines9 Electronics11 Lighting | Registered | 2008 |
| ITEX 1121035 · TMA649396 | ITEX Corporation | 35 Advertising36 Finance | Registered | 2005 |
| IDEXX 0630445 · TMA400378 | IDEXX LABORATORIES, INC. | 1 Chemicals9 Electronics10 Medical | Registered | 1992 |
| IDEC 0418691 · TMA233071 | IDEC CORPORATION | 9 Electronics11 Lighting | Registered | 1979 |
| ITC 2205100 · TMA1240141 · design | Guangzhou BaoLun Electronics Co., Ltd | 38 Telecommunications | Registered | 2024 |
| ITASA 2203388 · TMA1225455 · design | Owner not shown | 16 Paper | Registered | 2024 |
| iTag 2188293 · TMA1269799 | Position Imaging, Inc. | 9 Electronics | Registered | 2024 |
| ITC 2181604 · TMA1259473 | Memphis Wood Fire Grills, LLC | 11 Lighting | Registered | 2024 |
| IDEGG 2100992 · TMA1198707 | Shenzhen Feikeyida Technology Co. Ltd | 25 Clothing | Registered | 2023 |
| ITHACA 2089315 · TMA1223597 · design | SANOFI | 42 Science | Registered | 2024 |
| ITK. 2087927 · TMA1254709 | Yahoo Inc. | 35 Advertising | Registered | 2024 |
| IDK 2080618 · TMA1284113 · design | IDK Co. Ltd. | 40 Treatment42 Science | Registered | 2025 |
| ITUOZO 2075669 · TMA1138852 | Fresenius Kabi Deutschland GmbH | 5 Pharmaceuticals | Registered | 2022 |
| ITOUCH 2070612 · TMA1183653 · design | ENTREPRISES ALLIÉES LTÉE | 5 Pharmaceuticals | Registered | 2023 |
| IWTGH 2066287 · TMA1157387 | Qingdao Dahaibian E-commerce Co. Ltd. | 28 Toys | Registered | 2022 |