Inventor · disambiguated record
Kai Liu
Also filed as: LIU KAI · LIU KAI-MAI
25 granted patents·10 pending applications·125 citations·filing 1995–2024
94Inventor score
Files withCOVIDIEN LP13ZHEJIANG DAHUA TECHNOLOGY CO6QANBA USA LLC4SHENZHEN QANBA TECH DEVELOPMENT CO LTD3YOTRIO GROUP CO LTD3
Top patents by PatentIndex Score
35 records- 0190US11947091B2Zoom lens and optical device having the sameZHEJIANG DAHUA TECHNOLOGY CO·Filed 2021·Granted Apr 2, 2024·3 cites·20 claims
- 0290USD609453SPatio umbrellaYOTRIO GROUP CO LTD·Filed 2008·Granted Feb 9, 2010·43 cites·1 claims
- 0386US10495860B2Zoom lens systemZHEJIANG DAHUA TECHNOLOGY CO·Filed 2016·Granted Dec 3, 2019·6 cites·17 claims
- 0483US11320631B2Lens system and imaging deviceZHEJIANG DAHUA TECHNOLOGY CO·Filed 2020·Granted May 3, 2022·3 cites·18 claims
- 0583US8360080B2UmbrellaYOTRIO GROUP CO LTD·Filed 2008·Granted Jan 29, 2013·15 cites·6 claims
- 0682US8113223B2Telescoping umbrellaWANG ZHONGLIN·Filed 2008·Granted Feb 14, 2012·16 cites·18 claims
- 0781US8402981B2Protective elementLIU KAI·Filed 2008·Granted Mar 26, 2013·11 cites·6 claims
- 0874US11224478B2Electrosurgical instruments for controlling thermal damageCOVIDIEN LP·Filed 2015·Granted Jan 18, 2022·2 cites·18 claims
- 0972US10987159B2Electrosurgical end effector assemblies and electrosurgical forceps configured to reduce thermal spreadCOVIDIEN LP·Filed 2015·Granted Apr 27, 2021·2 cites·6 claims
- 1070US12396783B2Electrosurgical instruments for controlling thermal damageCOVIDIEN LP·Filed 2022·Granted Aug 26, 2025·0 cites·18 claims
- 1167USD629603SPatio umbrellaYOTRIO GROUP CO LTD·Filed 2009·Granted Dec 28, 2010·14 cites·1 claims
- 1266US12478864B2Shaft joystickSHENZHEN QANBA TECH DEVELOPMENT CO LTD·Filed 2023·Granted Nov 25, 2025·0 cites·11 claims
- 1363US9826979B2Introducer and circular staplerSUZHOU TOUCHSTONE INT MEDICAL SCIENCE CO LTD·Filed 2014·Granted Nov 28, 2017·3 cites·30 claims
- 1463US2024108814A1Disposable injection penESC MEDTECH SUZHOU CO LTD·Filed 2023·Application pending·0 cites
- 1563US2022401144A1Surgical instruments capable of being selectively disassembled to facilitate replacement of disposable components and/or sterilization of reusable componentsCOVIDIEN LP·Filed 2022·Application pending·0 cites
- 1662US12093071B2Storage-facilitated shaft joystickSHENZHEN QANBA TECH DEVELOPMENT CO LTD·Filed 2023·Granted Sep 17, 2024·0 cites·8 claims
- 1762US11766289B2Energy-based surgical instrument for grasping, treating, and/or cutting tissueCOVIDIEN LP·Filed 2022·Granted Sep 26, 2023·0 cites·20 claims
- 1862US11234755B2Energy-based surgical instrument for grasping, treating, and/or cutting tissueCOVIDIEN LP·Filed 2017·Granted Feb 1, 2022·1 cites·15 claims
- 1961US11426230B2Surgical instruments capable of being selectively disassembled to facilitate replacement of disposable components and/or sterilization of reusable componentsCOVIDIEN LP·Filed 2014·Granted Aug 30, 2022·2 cites·8 claims
- 2057US2020197076A1Multifunctional vessel sealing and divider deviceCOVIDIEN LP·Filed 2020·Application pending·0 cites
- 2155US12117597B2Zoom lens and optical device having the sameZHEJIANG DAHUA TECHNOLOGY CO·Filed 2021·Granted Oct 15, 2024·0 cites·19 claims
- 2255US2025367542A1Key travel adjustable switch and gaming peripheralQANBA USA LLC·Filed 2024·Application pending·0 cites
- 2355US2025367541A1Key travel adjustable switchQANBA USA LLC·Filed 2024·Application pending·0 cites
- 2455US2025372318A1Key travel adjustable switchQANBA USA LLC·Filed 2024·Application pending·0 cites
- 2555US2025372321A1Key travel-adjustable switch and gaming peripheralQANBA USA LLC·Filed 2024·Application pending·0 cites
- 2653US12386160B2Zoom lensZHEJIANG DAHUA TECHNOLOGY CO·Filed 2023·Granted Aug 12, 2025·0 cites·18 claims
- 2753US2023226441A1Shaft joystick with light adjustment customization functionSHENZHEN QANBA TECH DEVELOPMENT CO LTD·Filed 2023·Application pending·0 cites
- 2848US11207127B2Surgical instruments facilitating replacement of disposable components and/or sterilization of reusable componentsCOVIDIEN LP·Filed 2014·Granted Dec 28, 2021·0 cites·18 claims
- 2948US10595933B2Multifunctional vessel sealing and divider deviceCOVIDIEN LP·Filed 2015·Granted Mar 24, 2020·0 cites·16 claims
- 3047US2017273735A1Surgical instruments facilitating replacement of disposable components and/or sterilization of reusable componentsCOVIDIEN LP·Filed 2014·Application pending·0 cites
- 3140US9629634B2Introducer accessoryCHEN WANGDONG·Filed 2012·Granted Apr 25, 2017·0 cites·29 claims
- 3239US11540872B2Electrosurgical instrument with trigger driven cutting functionCOVIDIEN LP·Filed 2017·Granted Jan 3, 2023·0 cites·17 claims
- 3337US11204488B2Lens system and imaging deviceZHEJIANG DAHUA TECHNOLOGY CO·Filed 2020·Granted Dec 21, 2021·0 cites·19 claims
- 3435US2021393317A1Vessel sealing and dissection with controlled gapCOVIDIEN LP·Filed 2017·Application pending·0 cites
- 3533US5569043ALatch mechanism for use in an electric connectorFiled 1995·Granted Oct 29, 1996·4 cites·2 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →