Inventor · disambiguated record
Tsan-Chang Lee
Also filed as: LEE TSAN-CHANG
19 granted patents·3 pending applications·137 citations·filing 2009–2023
94Inventor score
Files withLEE TSAN CHANG22
Top patents by PatentIndex Score
22 records- 0195US11426839B2Hand tool available for operating screw members of three different specificationsLEE TSAN CHANG·Filed 2021·Granted Aug 30, 2022·6 cites·13 claims
- 0293US11370089B2Ratchet wrenchLEE TSAN CHANG·Filed 2020·Granted Jun 28, 2022·4 cites·9 claims
- 0393US10596685B2Engaging portion for a hand toolLEE TSAN CHANG·Filed 2018·Granted Mar 24, 2020·12 cites·9 claims
- 0488US9114510B2Pawl structure for ratchet wrenches and the wrenches using the sameLEE TSAN-CHANG·Filed 2013·Granted Aug 25, 2015·13 cites·10 claims
- 0583USD957219SSocketLEE TSAN CHANG·Filed 2020·Granted Jul 12, 2022·10 cites·1 claims
- 0682US9016174B2Ratchet wrenchLEE TSAN-CHANG·Filed 2012·Granted Apr 28, 2015·9 cites·14 claims
- 0781US9120210B2Open wrenchLEE TSAN-CHANG·Filed 2013·Granted Sep 1, 2015·8 cites·6 claims
- 0880US10967498B2Display structure for wrenchLEE TSAN CHANG·Filed 2018·Granted Apr 6, 2021·3 cites·9 claims
- 0980USD834903SWrench socketLEE TSAN CHANG·Filed 2017·Granted Dec 4, 2018·21 cites·1 claims
- 1079US8261635B2One-direction rachet wrenchLEE TSAN-CHANG·Filed 2009·Granted Sep 11, 2012·14 cites·11 claims
- 1172US8661946B2Ratchet wrenchLEE TSAN-CHANG·Filed 2011·Granted Mar 4, 2014·5 cites·10 claims
- 1270USD823083SRatchet wheel of wrenchesLEE TSAN CHANG·Filed 2017·Granted Jul 17, 2018·13 cites·1 claims
- 1361USD708920SPawl of a ratchet wrenchLEE TSAN-CHANG·Filed 2013·Granted Jul 15, 2014·12 cites·1 claims
- 1460US2025162109A1Engaging structure for hand toolLEE TSAN CHANG·Filed 2023·Application pending·0 cites
- 1557US12434357B2Ratchet wrenchLEE TSAN CHANG·Filed 2023·Granted Oct 7, 2025·0 cites·7 claims
- 1657US2024293918A1Wrench StructureLEE TSAN CHANG·Filed 2023·Application pending·0 cites
- 1756US12325109B2Ratchet wrench structureLEE TSAN CHANG·Filed 2022·Granted Jun 10, 2025·0 cites·3 claims
- 1850USD828130SWrenchLEE TSAN CHANG·Filed 2017·Granted Sep 11, 2018·5 cites·1 claims
- 1950US2016129581A1Hand tool with indication portion on handleLEE TSAN-CHANG·Filed 2014·Application pending·0 cites
- 2038USD1100614SCombination wrenchLEE TSAN CHANG·Filed 2023·Granted Nov 4, 2025·0 cites·1 claims
- 2138USD834902SWrenchLEE TSAN CHANG·Filed 2017·Granted Dec 4, 2018·2 cites·1 claims
- 2229USD828129SWrenchLEE TSAN CHANG·Filed 2017·Granted Sep 11, 2018·0 cites·1 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →