Estech Systems, Inc.
Records under this name other than the patents Estech Systems, Inc. holds now: patents now held by others, patents whose terms have ended, and its applications, pending or abandoned. None of them is counted in the 3 patents it holds.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,466,696 | Services convergence among heterogeneous wired and wireless networks Term ended Term ended Oct 8, 2025 · From the USPTO record | Term ended | Term ended Oct 8, 2025 | From the USPTO record |
| US 7,916,651 | Services convergence among heterogeneous wired and wireless networks Term ended Term ended May 13, 2024 · From the USPTO record | Term ended | Term ended May 13, 2024 | From the USPTO record |
| US 7,068,684 | Quality of service in a voice over IP telephone system Term ended Term ended Jun 28, 2023 · From the USPTO record | Term ended | Term ended Jun 28, 2023 | From the USPTO record |
| US 7,123,699 | Voice mail in a voice over IP telephone system Term ended Term ended Feb 14, 2022 · From the USPTO record | Term ended | Term ended Feb 14, 2022 | From the USPTO record |
| US 6,925,167 | Service observing in a voice over IP telephone system Term ended Term ended Aug 25, 2021 · From the USPTO record | Term ended | Term ended Aug 25, 2021 | From the USPTO record |
| US 7,860,083 | Shared knowledge in a telephone system Term ended Term ended Feb 2, 2021 · From the USPTO record | Term ended | Term ended Feb 2, 2021 | From the USPTO record |
| US 8,194,845 | Telephone system Term ended Term ended Nov 13, 2019 · From the USPTO record | Term ended | Term ended Nov 13, 2019 | From the USPTO record |
| US 6,940,962 | Dial on-hold Term ended Term ended Jun 25, 2019 · From the USPTO record | Term ended | Term ended Jun 25, 2019 | From the USPTO record |
| US 6,842,505 | Communications system enhanced with human presence sensing capabilities Term ended Term ended Apr 5, 2019 · From the USPTO record | Term ended | Term ended Apr 5, 2019 | From the USPTO record |
| US 6,067,349 | Dialing using caller ID Term ended Term ended Dec 31, 2017 · From the USPTO record | Term ended | Term ended Dec 31, 2017 | From the USPTO record |