Assignee
ECHOWELL ELECTRONIC CO LTD
TW·11 granted patents·2 pending applications·29 citations·filing 1995–2020
Top patents by PatentIndex Score
13 records- 0168US10135402B1Grounding structure and grounding method of vacuum tube audio amplifierECHOWELL ELECTRONIC CO LTD·Filed 2017·Granted Nov 20, 2018·2 cites·14 claims
- 0267US10218320B1Vacuum tube audio amplifierECHOWELL ELECTRONIC CO LTD·Filed 2017·Granted Feb 26, 2019·2 cites·22 claims
- 0353US6442505B1Electronic trip meter for a bicycleECHOWELL ELECTRONIC CO LTD·Filed 1999·Granted Aug 27, 2002·18 cites·19 claims
- 0450US10938364B2Vacuum tube subwoofer extraction circuit systemECHOWELL ELECTRONIC CO LTD·Filed 2019·Granted Mar 2, 2021·0 cites·7 claims
- 0548US11121678B1Vacuum tube amplification system capable of reducing residual noise and a grounding method thereofECHOWELL ELECTRONIC CO LTD·Filed 2020·Granted Sep 14, 2021·0 cites·16 claims
- 0648US10755885B2Vacuum tube rear deviceECHOWELL ELECTRONIC CO LTD·Filed 2018·Granted Aug 25, 2020·0 cites·12 claims
- 0746US10924854B2Three-piece extensible movable soundboxECHOWELL ELECTRONIC CO LTD·Filed 2019·Granted Feb 16, 2021·0 cites·8 claims
- 0846US10856082B1Audio system with sound-field-type nature sound effectECHOWELL ELECTRONIC CO LTD·Filed 2019·Granted Dec 1, 2020·0 cites·15 claims
- 0944US2004092838A1Signal transmitting beltECHOWELL ELECTRONIC CO LTD·Filed 2003·Application pending·0 cites
- 1044US2004089977A1Manufacturing method for signal transmitting beltECHOWELL ELECTRONIC CO LTD·Filed 2003·Application pending·0 cites
- 1140US10727792B1Vacuum tube and transistor amplifier natural sound field tone dividing systemECHOWELL ELECTRONIC CO LTD·Filed 2019·Granted Jul 28, 2020·0 cites·7 claims
- 1237USD893460SVacuum tube speakerECHOWELL ELECTRONIC CO LTD·Filed 2018·Granted Aug 18, 2020·2 cites·1 claims
- 1334US5481901ADevice for demonstrating and testing electronic meters for bicyclesECHOWELL ELECTRONIC CO LTD·Filed 1995·Granted Jan 9, 1996·5 cites·6 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →