| GUARDSMARK 1324652 · TMA769067 | Guardsmark, LLC | 35 Advertising37 Construction39 Transport+3 | Registered | 2010 |
| GUARDSMARK 1286531 · TMA694981 | Guardsmark, LLC | 45 Legal | Registered | 2007 |
| GUARDSMAN 1753220 · TMA991888 · design | Univar Solutions Canada Ltd. | 1 Chemicals5 Pharmaceuticals | Registered | 2018 |
| GUARDSMAN 0740677 · TMA467861 | LINVATEC CORPORATION, A FLORIDA CORPORATION | 10 Medical | Registered | 1996 |
| GUARDSMAN 0736768 · TMA432086 | Univar Solutions Canada Ltd. | 1 Chemicals5 Pharmaceuticals | Registered | 1994 |
| GUARDSMAN 0705221 · TMA416080 · design | Univar Solutions Canada Ltd. | 1 Chemicals5 Pharmaceuticals | Registered | 1993 |
| GUARDS 0282336 · TMA139583 | Wyeth LLC a Delaware limited liability company | 5 Pharmaceuticals | Registered | 1965 |
| GUARDSMAN 0241275 · TMA109125 | Transform SR Brands LLC | 7 Machines12 Vehicles | Registered | 1958 |
| "GUARDSMAN" 0193722 · UCA26362 | SWIMC LLC | 2 Paints3 Cosmetics16 Paper | Registered | 1946 |
| GUARDSMAN 2117657 | Guardsman US LLC | 1 Chemicals2 Paints3 Cosmetics+5 | Pending | 2021 |
| GUARDSERVER 1070182 · TMA646137 | BI INCORPORATED | 9 Electronics | Registered | 2005 |
| GUARDACART 2360995 · design | Rivercity Innovations Ltd. | 9 Electronics42 Science | Pending | 2024 |
| GUARDACART 2360962 | Rivercity Innovations Ltd. | 9 Electronics42 Science | Pending | 2024 |
| GUARDEX 1556624 · TMA887924 | Haddenham Healthcare Limited | 5 Pharmaceuticals10 Medical | Registered | 2014 |
| GRIDSURE 1328176 · TMA755529 | SafeNet UK Limited | 9 Electronics36 Finance45 Legal | Registered | 2009 |
| GUARDOG 1148292 · TMA599138 | MARC EVON ENTERPRISES INC. | 28 Toys | Registered | 2004 |
| GUARDDOG 0817328 · TMA516818 | ITT Corporation | 9 Electronics | Registered | 1999 |
| GUARDZYME 0739188 · TMA464179 | Owner not shown | 1 Chemicals4 Oils7 Machines+2 | Registered | 1996 |
| GUARDEX 0409526 · TMA230782 | KIK HOLDCO COMPANY INC. | 1 Chemicals5 Pharmaceuticals | Registered | 1978 |
| GUARDTEK 2232601 | Guardteck Security Corp. | 7 Machines9 Electronics35 Advertising+3 | Pending | 2023 |
| GUARDTECK 2172846 | Guardteck Security Corp. | 37 Construction42 Science45 Legal | Pending | 2022 |
| GuardDog 2152235 | an individual | 19 Building | Pending | 2021 |
| GUARDECK 1972794 · design | Gestion IDAAM inc. | 6 Metal42 Science | Pending | 2019 |
| GUARDECK 1972793 | Gestion IDAAM inc. | 6 Metal42 Science | Pending | 2019 |
| GRTXIN 2244997 · TMA1264349 | Shenzhen Sanshen Technology Co. Ltd | 25 Clothing | Registered | 2024 |