Echowell Electronic Co., Ltd.
Records under this name other than the patents Echowell Electronic Co., Ltd. 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 5 patents it holds.
Showing 1 to 7 of 7 · Back to Echowell Electronic Co., Ltd.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 10,938,364 | Vacuum tube subwoofer extraction circuit system Lapsed on the fee record Ended Mar 2, 2025 · From the USPTO record | Lapsed on the fee record | Ended Mar 2, 2025 | From the USPTO record |
| US 10,924,854 | Three-piece extensible movable soundbox Lapsed on the fee record Ended Feb 16, 2025 · From the USPTO record | Lapsed on the fee record | Ended Feb 16, 2025 | From the USPTO record |
| US 10,755,885 | Vacuum tube rear device Lapsed on the fee record Ended Aug 25, 2024 · From the USPTO record | Lapsed on the fee record | Ended Aug 25, 2024 | From the USPTO record |
| US 10,727,792 | Vacuum tube and transistor amplifier natural sound field tone dividing system Lapsed on the fee record Ended Jul 28, 2024 · From the USPTO record | Lapsed on the fee record | Ended Jul 28, 2024 | From the USPTO record |
| US 6,442,505 | Electronic trip meter for a bicycle Term ended Term ended Aug 30, 2019 · From the USPTO record | Term ended | Term ended Aug 30, 2019 | From the USPTO record |
| US 6,192,300 | Bicycle computer Term ended Term ended Jun 27, 2017 · From the USPTO record | Term ended | Term ended Jun 27, 2017 | From the USPTO record |
| US 5,481,901 | Device for demonstrating and testing electronic meters for bicycles Term ended Term ended no later than Jan 9, 2016 · Low confidence | Term ended | Term ended no later than Jan 9, 2016 | Low confidence |