Inventor · disambiguated record
Yu-Chih Chang
Also filed as: CHANG YU-CHIH
10 granted patents·7 pending applications·18 citations·filing 2002–2021
82Inventor score
Top patents by PatentIndex Score
17 records- 0186US9111700B2Thin push button structureICHIA TECH INC·Filed 2013·Granted Aug 18, 2015·7 cites·10 claims
- 0279US10971314B2Key switchDARFON ELECTRONICS CORP·Filed 2020·Granted Apr 6, 2021·1 cites·1 claims
- 0369US11289284B2Keyswitch structureDARFON ELECTRONICS CORP·Filed 2021·Granted Mar 29, 2022·0 cites·23 claims
- 0469US7893375B2Non-backlighted illuminating keypadICHIA TECH INC·Filed 2008·Granted Feb 22, 2011·5 cites·12 claims
- 0565US10984968B2Keyswitch structureDARFON ELECTRONICS CORP·Filed 2020·Granted Apr 20, 2021·0 cites·14 claims
- 0661US8056216B2Method of manufacturing non-backlighted illuminating keypadCHANG YU-CHIH·Filed 2008·Granted Nov 15, 2011·4 cites·15 claims
- 0760US9105422B2Thin key structureICHIA TECH INC·Filed 2013·Granted Aug 11, 2015·1 cites·10 claims
- 0847US11824575B2Protective cover for tablet computer and portable electronic deviceDARFON ELECTRONICS CORP·Filed 2021·Granted Nov 21, 2023·0 cites·10 claims
- 0946US11551890B2Keyswitch preventing lateral slidingDARFON ELECTRONICS CORP·Filed 2020·Granted Jan 10, 2023·0 cites·11 claims
- 1046US11551889B2Key switchDARFON ELECTRONICS CORP·Filed 2020·Granted Jan 10, 2023·0 cites·17 claims
- 1142US2009057532A1Mold structure for forming keypad panelCHANG YU-CHIH·Filed 2007·Application pending·0 cites
- 1238US2009057932A1Manufacturing method of keypad panelCHANG YU-CHIH·Filed 2007·Application pending·0 cites
- 1335US2013075026A1Method for bonding plastic mold member onto metal housingCHANG YU-CHIH·Filed 2012·Application pending·0 cites
- 1435US2013075941A1Method for bonding plastic mold member onto metal housingCHANG YU-CHIH·Filed 2012·Application pending·0 cites
- 1535US2019237279A1Cap structure and keyswitch thereofDARFON ELECTRONICS CORP·Filed 2019·Application pending·0 cites
- 1634US2013062530A1Biochemical material detection systemCHANG YU CHIH·Filed 2011·Application pending·0 cites
- 1733US2003221782A1Structural improvement for wafer supporting apparatusM D TECHNOLOGY INC·Filed 2002·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →