| okdeals 2079570 · TMA1165899 | Shanghai Qinjue Network Technology Co. Ltd. | 9 Electronics | Registered | 2023 |
| OCTOLIFT 2191037 · TMA1180929 | Bonnie & Claus Inc. | 3 Cosmetics | Registered | 2023 |
| Ousudela 2159039 · TMA1209977 | Meishan Fantexi E-commerce Co.Ltd. | 9 Electronics | Registered | 2023 |
| Oktollerfest 2115412 · TMA1155556 | Screaming Toller Inc. | 32 Beer | Registered | 2022 |
| OSSTELL 2040116 · TMA1199844 | an individual | 10 Medical44 Medical | Registered | 2023 |
| OctoLas 2024024 · TMA1147792 | NICHIA CORPORATION | 10 Medical | Registered | 2022 |
| OUKITEL 1864896 · TMA1063080 | Shenzhen Yunji Intelligent Technology Co. Ltd. | 9 Electronics | Registered | 2019 |
| OctoLas 1832300 · TMA1027161 | NICHIA CORPORATION | 9 Electronics11 Lighting | Registered | 2019 |
| OCYTLA 1731220 · TMA1048800 | an individual | 5 Pharmaceuticals | Registered | 2019 |
| OUKITEL 1710682 · TMA948237 · design | SHENGZHEN YUNJI INTELLIGENT TECHNOLOGY CO.LTD | 9 Electronics | Registered | 2016 |
| OCTAWALL 1623076 · TMA899944 | Octanorm-Vertriebs-GmbH fur Bauelemente | 6 Metal11 Lighting19 Building+1 | Registered | 2015 |
| OAKDALE 1622921 · TMA950198 | GRAND RIVER ENTERPRISES SIX NATIONS LTD. | 34 Tobacco | Registered | 2016 |
| OAKDALE 1621037 · TMA950197 | GRAND RIVER ENTERPRISES SIX NATIONS LTD. | 34 Tobacco | Registered | 2016 |
| OCTALITE 1525902 · TMA834702 | Owner not shown | 5 Pharmaceuticals | Registered | 2012 |
| OXSTEEL 1499042 · TMA859265 | Oxane Materials, Inc. | 1 Chemicals | Registered | 2013 |
| OCTAL 1435474 · TMA826338 | an individual | 16 Paper17 Rubber | Registered | 2012 |
| OCTOLYST 1145828 · TMA598567 | Evonik Operations GmbH | 1 Chemicals | Registered | 2004 |
| OCTALBIN 1094348 · TMA604033 | an individual | 5 Pharmaceuticals | Registered | 2004 |
| OCTALINK 1084949 · TMA573251 · design | SHIMANO INC. | 6 Metal7 Machines12 Vehicles+2 | Registered | 2003 |
| OCTOLUX 1001369 · TMA531471 | an individual | 6 Metal | Registered | 2000 |
| OCTOLAM 1001368 · TMA531472 | an individual | 6 Metal16 Paper | Registered | 2000 |
| OSTELIN 0991942 · NFLD1942 | GLAXO GROUP LIMITED | 5 Pharmaceuticals | Registered | 1932 |
| OSTEOHEALTH 0805048 · TMA472383 | American Regent, Inc. | 5 Pharmaceuticals10 Medical | Registered | 1997 |
| OXITOL 0304798 · TMA155258 | an individual | 1 Chemicals7 Machines | Registered | 1968 |
| OXYDOL 0183032 · UCA18485 | Awesome Products, Inc. | 3 Cosmetics | Registered | 1943 |