| ISOLACTION 0908598 | Hydro-Québec | 1 Chemicals2 Paints3 Cosmetics+42 | Pending | 1996 |
| iCLAS 2288224 · TMA1281572 | Adagio Medical, Inc. | 10 Medical | Registered | 2025 |
| IKeelsy 2206756 · TMA1241444 | an individual | 16 Paper | Registered | 2024 |
| ISLUX 2188866 · TMA1232759 | an individual | 11 Lighting | Registered | 2024 |
| ISOLIGHT 2165835 · TMA1201889 | IsoPlexis Corporation | 1 Chemicals | Registered | 2023 |
| iClose 2156978 · TMA1208821 | iClose Software inc. | 9 Electronics | Registered | 2023 |
| IGLOOZIE 2117307 · TMA1195551 | IGLOO PRODUCTS CORP. | 21 Housewares | Registered | 2023 |
| iClosam 2066438 · TMA1189241 | Shenzhen Haiweisi Technology Co.Ltd. | 25 Clothing | Registered | 2023 |
| Icelake 1995259 · TMA1222723 | VICOSTONE JOINT STOCK COMPANY | 19 Building20 Furniture | Registered | 2024 |
| ISOALKY 1935900 · TMA1123443 | Chevron Intellectual Property LLC | 1 Chemicals4 Oils45 Legal | Registered | 2022 |
| ICHALIG 1918752 · TMA1108445 · design | Bio-Thera Solutions, Ltd. | 5 Pharmaceuticals | Registered | 2021 |
| IceLuxe 1907529 · TMA1100849 | an individual | 3 Cosmetics6 Metal21 Housewares+4 | Registered | 2021 |
| ISLG 1827234 · TMA1000822 | Tologix Expert Systems Inc. | 9 Electronics35 Advertising38 Telecommunications+1 | Registered | 2018 |
| IGLUCOSE 1812198 · TMA1037644 · design | Smart Meter Corp. | 9 Electronics10 Medical44 Medical | Registered | 2019 |
| IZELCAN 1805725 · TMA1059603 | an individual | 5 Pharmaceuticals | Registered | 2019 |
| IZELSHA 1771994 · TMA1049565 | GLAXO GROUP LIMITED | 5 Pharmaceuticals | Registered | 2019 |
| ISOLOCITY 1727689 · TMA949501 | CJB CONSULTING LTD. | 9 Electronics14 Jewellery16 Paper+7 | Registered | 2016 |
| ICOLOGIQ 1671122 · TMA942717 · design | an individual | 35 Advertising42 Science | Registered | 2016 |
| icListen 1645976 · TMA916566 | Ocean Sonics Ltd. | 9 Electronics | Registered | 2015 |
| ISOLAZ 1635303 · TMA900920 | Solta Medical, Inc. | 10 Medical44 Medical | Registered | 2015 |
| ISOLUS 1626026 · TMA934846 | CVB Inc dba Malouf Fine Linens | 20 Furniture | Registered | 2016 |
| ISKILLS 1616828 · TMA913234 · design | McGraw Hill LLC | 9 Electronics16 Paper | Registered | 2015 |
| ISKILLS 1616827 · TMA913233 | McGraw Hill LLC | 9 Electronics16 Paper | Registered | 2015 |
| ISLICE 1608205 · TMA868678 · design | B2B INTERNATIONAL HOLDING LIMITED | 34 Tobacco | Registered | 2014 |
| ICLASS 1581564 · TMA862313 | an individual | 9 Electronics | Registered | 2013 |