| OPENSOUND 2151099 · TMA1221351 · design | SHOKZ (SINGAPORE) PTE. LTD. | 9 Electronics | Registered | 2024 |
| opensnow 2132268 · TMA1232143 | SHOKZ (SINGAPORE) PTE. LTD. | 9 Electronics | Registered | 2024 |
| OPENSEA 2099944 · TMA1201319 | Greensea Systems, Inc. | 9 Electronics | Registered | 2023 |
| OPENGEAR 2053623 · TMA1201150 | Digi International Inc. | 9 Electronics42 Science | Registered | 2023 |
| OPENSEA 1945585 · TMA1223347 | Ozone Networks, Inc. | 35 Advertising42 Science | Registered | 2024 |
| OPENSWAN 1559719 · TMA873857 · design | Xelerance Corporation | 9 Electronics42 Science | Registered | 2014 |
| OPENGEAR 1311248 · TMA709287 | ROSS VIDEO LIMITED | 9 Electronics | Registered | 2008 |
| OPENGL 1070197 · TMA611252 · design | Hewlett Packard Enterprise Development LP | 9 Electronics16 Paper35 Advertising+4 | Registered | 2004 |
| OPENGL 0813415 · TMA487666 | Hewlett Packard Enterprise Development LP | 9 Electronics | Registered | 1998 |
| OPENSEA 2178940 | Ozone Networks, Inc. | 6 Metal9 Electronics14 Jewellery+10 | Pending | 2022 |
| OPENSCALE 1965938 | INTERNATIONAL BUSINESS MACHINES CORPORATION | 9 Electronics35 Advertising42 Science | Pending | 2019 |
| OPENSOLAR 1955224 | OpenSolar Pty Ltd. | 9 Electronics35 Advertising42 Science | Pending | 2019 |
| OFFNIC 2237540 · TMA1258203 | Owner not listed | 25 Clothing34 Tobacco | Registered | 2024 |
| OFVENS 2236210 · TMA1256871 | Heyuan Youzhuoke Electronic Commerce Co. Ltd | 20 Furniture | Registered | 2024 |
| OUFANG 2208798 · TMA1252404 · design | Nanjing Oufang Textile Co. Ltd. | 24 Textiles25 Clothing | Registered | 2024 |
| OBONES 2199146 · TMA1284540 | an individual | 9 Electronics | Registered | 2025 |
| OVNS 2181020 · TMA1229051 | OVNS (Shenzhen) Technology Co. Ltd. | 34 Tobacco | Registered | 2024 |
| OVEN2GO 2173404 · TMA1204391 | an individual | 16 Paper | Registered | 2023 |
| OPENACE 2152711 · TMA1241063 · design | SHOKZ HOLDING LIMITED | 9 Electronics | Registered | 2024 |
| OpenWick 2134945 · TMA1212066 | Fil-Tec, Inc. | 3 Cosmetics4 Oils | Registered | 2023 |
| OPENZ 2132263 · TMA1232142 | SHOKZ (SINGAPORE) PTE. LTD. | 9 Electronics | Registered | 2024 |
| openspeed 2132262 · TMA1232141 | SHOKZ (SINGAPORE) PTE. LTD. | 9 Electronics | Registered | 2024 |
| OPENCOACH 2132251 · TMA1232140 | SHOKZ (SINGAPORE) PTE. LTD. | 9 Electronics | Registered | 2024 |
| openjoy 2131102 · TMA1242381 | SHOKZ HOLDING LIMITED | 9 Electronics | Registered | 2024 |
| openjog 2131101 · TMA1242380 | SHOKZ HOLDING LIMITED | 9 Electronics | Registered | 2024 |