| ONETOUCH 1219048 · TMA636072 | LifeScan IP Holdings, LLC | 10 Medical | Registered | 2005 |
| ONETOUCH 1171545 · TMA662994 | LifeScan IP Holdings, LLC | 9 Electronics | Registered | 2006 |
| ONETOUCH 1155813 · TMA652460 | LifeScan IP Holdings, LLC | 5 Pharmaceuticals10 Medical | Registered | 2005 |
| ONETOUCH 1046081 · TMA589752 | Shurtape Technologies, LLC | 16 Paper | Registered | 2003 |
| ONETOUCH 2208666 | an individual | 9 Electronics | Pending | 2022 |
| ONETOUCH 2159136 · design | LifeScan IP Holdings, LLC | 1 Chemicals5 Pharmaceuticals9 Electronics+3 | Pending | 2022 |
| ONETOUCH 2159134 · design | LifeScan IP Holdings, LLC | 1 Chemicals5 Pharmaceuticals9 Electronics+3 | Pending | 2022 |
| OMNITOUCH 1530055 · TMA867925 | Owner not shown | 9 Electronics | Registered | 2013 |
| OMNITOUCH 2350459 | an individual | 10 Medical | Pending | 2024 |
| OMTECH 2117382 · TMA1210768 · design | Shanghai Yunhui Trading Co. Ltd. | 7 Machines | Registered | 2023 |
| ONTOZRY 2069963 · TMA1204866 | SK BIOPHARMACEUTICALS CO. LTD. | 5 Pharmaceuticals | Registered | 2023 |
| OnWatch 2005436 · TMA1128416 | Owner not shown | 9 Electronics | Registered | 2022 |
| ONTIC 2203167 | Ontic Engineering & Manufacturing UK Limited | 7 Machines9 Electronics12 Vehicles+4 | Pending | 2022 |
| ONETOUCH 24/7 2110434 | LifeScan IP Holdings, LLC | 9 Electronics10 Medical | Pending | 2021 |
| Ontaki 2227810 · TMA1253838 | Owner not shown | 8 Hand | Registered | 2024 |
| ONDECK 2184553 · TMA1231370 | Corteva Agriscience LLC | 5 Pharmaceuticals | Registered | 2024 |
| ONDOG 2159244 · TMA1210011 · design | Anhaorui Electronics Co. Limited | 9 Electronics | Registered | 2023 |
| OMTEKNI 2156109 · TMA1191126 | GLAXO GROUP LIMITED | 5 Pharmaceuticals | Registered | 2023 |
| ONEHOUDES 2111734 · TMA1187480 | Zhongshan Yijian Fangzi Trading Co. Ltd. | 11 Lighting | Registered | 2023 |
| OneTag 2108482 · TMA1219046 | BlueCats Australia Pty Limited | 9 Electronics | Registered | 2024 |
| ondesignca 2019964 · TMA1132199 | Owner not shown | 42 Science | Registered | 2022 |
| OWNIT1ST 1995551 · TMA1125066 | an individual | 14 Jewellery26 Sewing | Registered | 2022 |
| ONETest 1987497 · TMA1131511 | Fusion Genomics Corporation | 1 Chemicals5 Pharmaceuticals44 Medical | Registered | 2022 |
| ONETAK 1964913 · TMA1128600 | an individual | 9 Electronics12 Vehicles | Registered | 2022 |
| ONETAQ 1941289 · TMA1188995 | New England Biolabs Inc. | 1 Chemicals | Registered | 2023 |