Device Engineering Co., Ltd.
Records under this name other than patents Device Engineering Co., Ltd. holds now: patents now held by others, patents whose terms have ended, and its applications, pending or abandoned.
Showing 1 to 10 of 10 · Back to Device Engineering Co., Ltd.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,675,276 | DC/DC converter Formerly held In force · From the USPTO record | In force | From the USPTO record | |
| US 7,545,129 | Switching power supply circuit Formerly held In force · From the USPTO record | In force | From the USPTO record | |
| US 7,638,994 | Switching power supply circuit Formerly held In force · From the USPTO record | In force | From the USPTO record | |
| US 7,518,428 | Phase compensation circuit and power circuit having same Formerly held Term ended Term ended Aug 26, 2026 · From the USPTO record | Term ended | Term ended Aug 26, 2026 | From the USPTO record |
| US 7,459,895 | Power circuit Formerly held Term ended Term ended Apr 4, 2026 · From the USPTO record | Term ended | Term ended Apr 4, 2026 | From the USPTO record |
| US 7,142,040 | Stabilized power supply circuit Formerly held Term ended Term ended Feb 24, 2025 · From the USPTO record | Term ended | Term ended Feb 24, 2025 | From the USPTO record |
| US 6,853,172 | Switching Regulator Formerly held Term ended Term ended Oct 28, 2023 · High confidence | Term ended | Term ended Oct 28, 2023 | High confidence |
| US 6,580,253 | Boosting and Step-Down Switching Regulator Controlling Circuit and Boosting and Step-Down Switching Regulator for Use in the Same Formerly held Term ended Term ended Aug 6, 2022 · High confidence | Term ended | Term ended Aug 6, 2022 | High confidence |
| US 7,135,844 | Control circuit for DC/DC converter Formerly held Lapsed on the fee record Ended Nov 14, 2018 · From the USPTO record | Lapsed on the fee record | Ended Nov 14, 2018 | From the USPTO record |
| US 5,739,887 | Liquid crystal display device with reduced frame portion surrounding display area Formerly held Term ended Term ended no later than Apr 14, 2018 · Low confidence | Term ended | Term ended no later than Apr 14, 2018 | Low confidence |