| OPENCOACH 2132251 · TMA1232140 | SHOKZ (SINGAPORE) PTE. LTD. | 9 Electronics | Registered | 2024 |
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| OpenComm 2052258 · TMA1198534 | SHOKZ (SINGAPORE) PTE. LTD. | 9 Electronics | Registered | 2023 |
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| OPENCOLO 2015454 · TMA1185807 | Energy Group Networks LLC | 38 Telecommunications42 Science | Registered | 2023 |
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| OPENJDK 1960492 · TMA1227578 | Oracle America, Inc. | 9 Electronics16 Paper | Registered | 2024 |
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| OPENCAST 1910774 · TMA1090134 | OPENM INC. | 10 Medical | Registered | 2020 |
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| OPENCARE 1894513 · TMA1106760 | Opencare Inc. | 35 Advertising42 Science | Registered | 2021 |
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| OPENCAPI 1817988 · TMA1068290 | Compute Express Link Consortium, Inc. | 9 Electronics16 Paper35 Advertising | Registered | 2020 |
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| OpenXC 1639247 · TMA944699 | FORD MOTOR COMPANY | 9 Electronics | Registered | 2016 |
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| OPENCAR 1621556 · TMA1030344 | INRIX, Inc. | 9 Electronics42 Science | Registered | 2019 |
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| OPENCASE 1429480 · TMA767947 | Synamedia Limited | 9 Electronics | Registered | 2010 |
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| OPENCL 1418588 · TMA774817 | Apple Inc. | 9 Electronics | Registered | 2010 |
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| OPENCALL 0784131 · TMA498870 | Hewlett Packard Enterprise Development LP | 9 Electronics | Registered | 1998 |
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| OPENEC 0774247 · TMA469098 | QHR TECHNOLOGIES INC. | 9 Electronics35 Advertising | Registered | 1997 |
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| OpenCase 2192021 | BioSpark AI Technologies Inc. | 9 Electronics42 Science | Pending | 2022 |
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| OPENSCOPIC 1822131 · TMA1018840 | Richard S. Boorman Professional Corporation | 44 Medical | Registered | 2019 |
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| OPENCIRCLE 2141009 · design | OpenCircle Membership Services and Workforce Development Association | 9 Electronics16 Paper35 Advertising+2 | Pending | 2021 |
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| OPENCIRCLE 2122751 | OpenCircle Membership Services and Workforce Development Association | 9 Electronics16 Paper35 Advertising+2 | Pending | 2021 |
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| OPENSPACE 1702991 · TMA928586 | LOGIX ITS INC. | 9 Electronics19 Building | Registered | 2016 |
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| OPENSTACK 1697565 · TMA975142 | OpenStack Foundation, a non-stock, non profit corporation | 35 Advertising41 Education | Registered | 2017 |
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| OPENSPARC 1304573 · TMA837815 | SPARC INTERNATIONAL, INC. | 9 Electronics16 Paper | Registered | 2012 |
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| OpenScape 1178563 · TMA677483 | Unify Software and Solutions GmbH & Co. KG | 9 Electronics | Registered | 2006 |
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| OPENSCALE 1965938 | INTERNATIONAL BUSINESS MACHINES CORPORATION | 9 Electronics35 Advertising42 Science | Pending | 2019 |
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| OPENCLINICA 1457286 · TMA778374 | Akaza Research LLC | 9 Electronics41 Education42 Science | Registered | 2010 |
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| OPENACE 2152711 · TMA1241063 · design | SHOKZ HOLDING LIMITED | 9 Electronics | Registered | 2024 |
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| OpenWick 2134945 · TMA1212066 | Fil-Tec, Inc. | 3 Cosmetics4 Oils | Registered | 2023 |
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