Inventor · disambiguated record
Hung Yu Cheng
Also filed as: CHENG HUNG Y · CHENG HUNG YU
47 granted patents·32 pending applications·705 citations·filing 1998–2024
98Inventor score
Files withWORLD WIDE STATIONERY MFG CO49RICHTEK TECHNOLOGY CORP12TO CHUN YUEN3CHENG HUNG YU2LECO STATIONERY MFG2
Top patents by PatentIndex Score
79 records- 0199US7534064B2Ring mechanism biased to closed and locked positionWORLD WIDE STATIONERY MFG CO·Filed 2005·Granted May 19, 2009·39 cites·13 claims
- 0299US6749357B2Ring binder mechanismWORLD WIDE STATIONERY MFG CO·Filed 2001·Granted Jun 15, 2004·118 cites·21 claims
- 0398US7524128B2Ring binder mechanism spring biased to a locked positionWORLD WIDE STATIONERY MFG CO·Filed 2006·Granted Apr 28, 2009·35 cites·9 claims
- 0498US7296946B2Ring binder mechanismMICROSOFT CORP·Filed 2002·Granted Nov 20, 2007·75 cites·30 claims
- 0597US7731441B2Ring binder mechanismWORLD WIDE STATIONERY MFG CO·Filed 2007·Granted Jun 8, 2010·25 cites·16 claims
- 0697US7404685B2Ring binder mechanism spring biased to a locked position when ring members closeWORLD WIDE STATIONERY MFG CO·Filed 2004·Granted Jul 29, 2008·46 cites·15 claims
- 0796US7748922B2Ring binder mechanism with dual pivot locking elementsWORLD WIDE STATIONERY MFG CO·Filed 2005·Granted Jul 6, 2010·23 cites·17 claims
- 0896US7549817B2Ready lock ring binder mechanismWORLD WIDE STATIONERY MFG CO·Filed 2004·Granted Jun 23, 2009·45 cites·28 claims
- 0996US7275886B2Positive lock ring binder mechanismWORLD WIDE STATIONARY MFG CO L·Filed 2004·Granted Oct 2, 2007·56 cites·30 claims
- 1095US7828491B2Travel bar for use with a ring mechanismWORLD WIDE STATIONERY MFG CO·Filed 2005·Granted Nov 9, 2010·16 cites·20 claims
- 1194US8186899B2Ring binder mechanismNG WING YIU·Filed 2010·Granted May 29, 2012·21 cites·15 claims
- 1294US7758271B2Ring mechanism biased to closed and locked positionWORLD WIDE STATIONERY MFG CO·Filed 2009·Granted Jul 20, 2010·11 cites·16 claims
- 1394US7744300B2Ready lock ring binder mechanismWORLD WIDE STATIONERY MFG CO·Filed 2007·Granted Jun 29, 2010·11 cites·17 claims
- 1492US7661898B2Soft close ring binder mechanism with reinforced travel barWORLD WIDE STATIONERY MFG CO·Filed 2004·Granted Feb 16, 2010·28 cites·27 claims
- 1592US7597498B2Positive lock ring binder mechanismWORLD WIDE STATIONERY MFG CO·Filed 2007·Granted Oct 6, 2009·9 cites·21 claims
- 1690US7891901B2Ready lock ring binder mechanismWORLD WIDE STATIONERY MFG CO·Filed 2008·Granted Feb 22, 2011·6 cites·14 claims
- 1790US7878729B2Intermediate connector for a ring binder mechanismWORLD WIDE STATIONERY MFG CO·Filed 2005·Granted Feb 1, 2011·6 cites·15 claims
- 1889US10644600B2Constant-time buck-boost switching regulator and control circuit and control method thereofRICHTEK TECHNOLOGY CORP·Filed 2018·Granted May 5, 2020·6 cites·22 claims
- 1989US7762734B2Ring binder mechanismWORLD WIDE STATIONERY MFG CO·Filed 2008·Granted Jul 27, 2010·6 cites·22 claims
- 2088US7513708B2Ring binder mechanism having slide connectorWORLD WIDE STATIONERY MFG CO·Filed 2005·Granted Apr 7, 2009·8 cites·25 claims
- 2187US8038361B2Ready lock ring binder mechanismWORLD WIDE STATIONERY MFG CO·Filed 2011·Granted Oct 18, 2011·7 cites·12 claims
- 2287US7600939B2Ring binder mechanism with sliding hinge plateWORLD WIDE STATIONERY MFG CO·Filed 2007·Granted Oct 13, 2009·12 cites·15 claims
- 2386US9787187B2Dual-constant-time buck-boost switching regulator and control circuit and method thereofRICHTEK TECHNOLOGY CORP·Filed 2016·Granted Oct 10, 2017·5 cites·13 claims
- 2485US8043018B2Ring binder mechanismWORLD WIDE STATIONERY MFG CO·Filed 2010·Granted Oct 25, 2011·6 cites·23 claims
- 2583US10097079B1Dual constant time switching regulator and switching control circuit and method thereofRICHTEK TECHNOLOGY CORP·Filed 2018·Granted Oct 9, 2018·4 cites·13 claims
- 2683US7654765B2Ring binder having a clipWORLD WIDE STATIONARY MFG CO L·Filed 2006·Granted Feb 2, 2010·4 cites·24 claims
- 2782US12055964B2Multi-loop power converter and multi-loop error amplifier circuit and control method thereofRICHTEK TECHNOLOGY CORP·Filed 2023·Granted Aug 6, 2024·2 cites·20 claims
- 2881US12034367B2Switching power converter and active EMI filter circuit thereofRICHTEK TECHNOLOGY CORP·Filed 2022·Granted Jul 9, 2024·1 cites·2 claims
- 2981US7445396B2Hangable ring mechanismWORLD WIDE STATIONERY MFG CO·Filed 2007·Granted Nov 4, 2008·3 cites·20 claims
- 3080US8006354B2Plate clip with open handleLECO STATIONERY MFG COMPANY LTD·Filed 2006·Granted Aug 30, 2011·5 cites·3 claims
- 3177US10532599B2Ring binder mechanismWORLD WIDE STATIONERY MFG CO LTD·Filed 2017·Granted Jan 14, 2020·1 cites·14 claims
- 3276US8573876B2Soft close ring binder mechanism with mating ring tipsCHENG HUNG YU·Filed 2005·Granted Nov 5, 2013·3 cites·18 claims
- 3375US8002488B2Soft close ring binder mechanismWORLD WIDE STATIONERY MFG CO·Filed 2004·Granted Aug 23, 2011·12 cites·20 claims
- 3473US12249910B1Switching power converter and active EMI filter circuit thereofRICHTEK TECHNOLOGY CORP·Filed 2024·Granted Mar 11, 2025·0 cites·2 claims
- 3571US7241067B2Ring mechanism having blunt endsWORLD WIDE STATIONERY MFG CO·Filed 2003·Granted Jul 10, 2007·9 cites·12 claims
- 3671US2008050171A1Ring binder mechanismWORLD WIDE STATIONERY MFG CO·Filed 2007·Application pending·0 cites
- 3769US7198422B2Flexible strap ring binderWORLD WIDE STATIONERY MFG CO·Filed 2002·Granted Apr 3, 2007·13 cites·28 claims
- 3868US2007283542A1Method of Manufacturing a Ring MechanismWORLD WIDE STATIONERY MFG CO·Filed 2007·Application pending·0 cites
- 3967US2007140779A1Ring Binder MechanismWORLD WIDE STATIONERY MFG CO·Filed 2006·Application pending·0 cites
- 4066US6007266AFastener for a ring binder and method of producing a binder assemblyWORLD WIDE STATIONERY MFG CO·Filed 1998·Granted Dec 28, 1999·21 cites·34 claims
- 4166US2009274509A1Ring binder mechanism with sliding hinge plateWORLD WIDE STATIONERY MFG CO·Filed 2009·Application pending·0 cites
- 4266US2009041531A1Lever-arch type file mechanismTO CHUN YUEN·Filed 2008·Application pending·0 cites
- 4365US2007048078A1Ring binder having a clipWORLD WIDE STATIONERY MFG CO·Filed 2005·Application pending·0 cites
- 4465US2009072113A1Support stand for structures that hold pages and methods of using the sameWORLD WIDE STATIONERY MFG CO·Filed 2007·Application pending·0 cites
- 4565US2007048077A1Ring binder having a clipWORLD WIDE STATIONERY MFG CO·Filed 2005·Application pending·0 cites
- 4664US2008253827A1Lever-arch type file mechanismTO CHUN YUEN·Filed 2007·Application pending·0 cites
- 4764US2008298883A1Ring Binder Kit and Fastening SystemWORLD WIDE STATIONERY MFG CO·Filed 2007·Application pending·0 cites
- 4863US6974273B2Ring binderWORLD WIDE STATIONERY MFG CO·Filed 2002·Granted Dec 13, 2005·4 cites·27 claims
- 4963US2008199246A1Ring Binder Mechanism having Plastic HousingWORLD WIDE STATIONERY MFG CO·Filed 2007·Application pending·0 cites
- 5063US2007231057A1Loose-leaf ringLECO STATIONERY MFG·Filed 2007·Application pending·0 cites
Showing the top 50 of 79 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →