| ORAJET 1774746 · TMA1000700 | Orafol Europe GmbH | 16 Paper17 Rubber20 Furniture | Registered | 2018 |
| ORACOAT 1879145 · TMA1072164 | Quest Products, LLC | 5 Pharmaceuticals | Registered | 2020 |
| ORACOAT 2269050 | Quest Products, LLC | 5 Pharmaceuticals30 Coffee | Pending | 2023 |
| ORIWEST 1844998 · TMA1022257 · design | 9140-0994 Quebec Inc. DBA Candex Inc. | 3 Cosmetics11 Lighting14 Jewellery+4 | Registered | 2019 |
| ORIWEST 1844997 · TMA1022238 | 9140-0994 Quebec Inc. DBA Candex Inc. | 3 Cosmetics11 Lighting14 Jewellery+4 | Registered | 2019 |
| OROKETO 1798312 · TMA1038381 | an individual | 5 Pharmaceuticals | Registered | 2019 |
| ORIWEST 1696270 · TMA994873 · design | 9140-0994 Quebec Inc. (Candex) | 3 Cosmetics4 Oils11 Lighting | Registered | 2018 |
| ORACODE 1621665 · TMA898829 | KABA Ilco Inc. | 6 Metal9 Electronics | Registered | 2015 |
| ORGATER 2366663 | an individual | 1 Chemicals | Pending | 2024 |
| ORACTIVES 1412061 · TMA764355 | Lifeagen Biosciences of Florida Inc. | 5 Pharmaceuticals | Registered | 2010 |
| ORSDA 2258059 · TMA1276453 | Shenzhen Yihua Trading Co. Ltd. | 21 Housewares | Registered | 2024 |
| Orikithem 2244855 · TMA1263221 | Owner not listed | 21 Housewares | Registered | 2024 |
| Orxstra 2243558 · TMA1263084 | Owner not listed | 25 Clothing | Registered | 2024 |
| oersitor 2207478 · TMA1241504 | Wenzhou YuQiang Sanitaryware Co.,Ltd. | 11 Lighting | Registered | 2024 |
| ORIGHTY 2139430 · TMA1199085 · design | Wuyi chongmingniao e-commerce Co. Ltd | 21 Housewares | Registered | 2023 |
| ORSTCAP 2113221 · TMA1240908 · design | Shanghai Aowei Technology DevelopmentCo., Ltd. | 9 Electronics | Registered | 2024 |
| OROXID 2049532 · TMA1236835 · design | Owner not shown | 1 Chemicals3 Cosmetics5 Pharmaceuticals+2 | Registered | 2024 |
| ORCHID 2029233 · TMA1273595 | Wilmar Trading (China) Pte. Ltd. | 29 Meat30 Coffee | Registered | 2024 |
| Orkide 2028321 · TMA1158060 · design | Owner not shown | 29 Meat | Registered | 2022 |
| ORCATORCH 1914028 · TMA1116518 · design | Shenzhen Orcatorch Electronic Limited | 9 Electronics11 Lighting35 Advertising | Registered | 2021 |
| ORGAID 1913147 · TMA1090804 | ORGAID INC | 3 Cosmetics | Registered | 2020 |
| ORCHID 1893849 · TMA1107792 | ORCHID LABS INC. | 9 Electronics42 Science | Registered | 2021 |
| ORKOT 1872810 · TMA1046776 | TRELLEBORG SEALING SOLUTIONS GERMANY GMBH | 7 Machines17 Rubber | Registered | 2019 |
| ORSTEXIA 1712232 · TMA1042776 | Sumitomo Pharma Co. Ltd. | 5 Pharmaceuticals | Registered | 2019 |
| ORCHIDEA 1664613 · TMA945232 | an individual | 14 Jewellery | Registered | 2016 |