Inventor · disambiguated record
Hsien-Chung Tuan-Mu
Also filed as: TUAN MU HSIEN-CHUNG
18 granted patents·6 pending applications·422 citations·filing 1999–2014
95Inventor score
Files withEASCO HAND TOOLS INC7HAND TOOL DESIGN CORP4APEX BRANDS INC2APEX TOOL HK LTD TAIWAN BRANCH2LEA WAY HAND TOOL CORP2
Top patents by PatentIndex Score
24 records- 0196US6629477B2Reversible ratchet wrench with high torsionHAND TOOL DESIGN CORP·Filed 2001·Granted Oct 7, 2003·61 cites·2 claims
- 0296US6230591B1Reversible ratcheting tool with improved gear wheel/pawl engagementHAND TOOL DESIGN CORP·Filed 1999·Granted May 15, 2001·99 cites·20 claims
- 0394US6134990ARatcheting tool with improved gear wheel/pawl engagementHAND TOOL DESIGN CORP·Filed 1999·Granted Oct 24, 2000·75 cites·11 claims
- 0493US7231851B2Reversible ratcheting toolEASCO HAND TOOLS INC·Filed 2005·Granted Jun 19, 2007·30 cites·12 claims
- 0592US6868759B2Reversible ratcheting toolEASCO HAND TOOLS INC·Filed 2003·Granted Mar 22, 2005·44 cites·43 claims
- 0684US7340983B2Spanner with prevention of disengagement of fastenersEASCO HAND TOOLS INC·Filed 2004·Granted Mar 11, 2008·19 cites·41 claims
- 0780US7210578B2Display unit for storing tool assemblyLEA WAY HAND TOOL CORP·Filed 2005·Granted May 1, 2007·19 cites·14 claims
- 0876US7673542B2Spanner with prevention of disengagement of fastenersEASCO HAND TOOLS INC·Filed 2008·Granted Mar 9, 2010·4 cites·15 claims
- 0974US6701768B2Process for making ratchet wheelsHAND TOOL DESIGN CORP·Filed 2002·Granted Mar 9, 2004·16 cites·13 claims
- 1073US8978524B2Ratchetable open-ended wrenchAPEX TOOL HK LTD TAIWAN BRANCH·Filed 2013·Granted Mar 17, 2015·5 cites·14 claims
- 1172US8347764B2Ratchetable open-ended wrenchAPEX TOOL HK LTD TAIWAN BRANCH·Filed 2009·Granted Jan 8, 2013·10 cites·24 claims
- 1271US8631725B2Ratchetable open-ended wrenchTUAN-MU HSIEN-CHUNG·Filed 2008·Granted Jan 21, 2014·11 cites·19 claims
- 1369US8813612B2Tool locking mechanismAPEX BRANDS INC·Filed 2013·Granted Aug 26, 2014·3 cites·14 claims
- 1465US8375831B2Tool locking mechanismEASCO HAND TOOLS INC·Filed 2008·Granted Feb 19, 2013·3 cites·18 claims
- 1563US7137320B2Ratcheting tool driverEASCO HAND TOOLS INC·Filed 2003·Granted Nov 21, 2006·12 cites·32 claims
- 1661US9975225B2Tool locking mechanismAPEX BRANDS INC·Filed 2014·Granted May 22, 2018·1 cites·11 claims
- 1753US6907803B2Single-direction operation type ratchet wrench structureEASCO HAND TOOLS INC·Filed 2002·Granted Jun 21, 2005·5 cites·12 claims
- 1849US7036227B2Process for making ratchet wheelsLING DAVID·Filed 2004·Granted May 2, 2006·5 cites·2 claims
- 1949US2006186069A1Telescopic tool supportLEA WAY HAND TOOL CORP·Filed 2005·Application pending·0 cites
- 2045US2004079205A1Spanner with prevention of disengagement of fastenersFiled 2003·Application pending·0 cites
- 2144US2003121373A1Spanner with prevention of disengagement of fastenersFiled 2002·Application pending·0 cites
- 2243US2007277652A1Reversible ratcheting toolTUAN-MU HSIEN-CHUNG·Filed 2006·Application pending·0 cites
- 2342US2001054334A1Spanner with prevention of disengagement of fastenersFiled 2001·Application pending·0 cites
- 2440US2006230883A1Reversible ratchet wrench with high torsionLING DAVID·Filed 2003·Application pending·0 cites
Join the waitlist — get patent alerts
Get an alert when Hsien-Chung Tuan-Mu files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →