Inventor · disambiguated record
Yi-Chih Chang
Also filed as: CHANG YI-CHIH
13 granted patents·9 pending applications·38 citations·filing 1998–2025
86Inventor score
Top patents by PatentIndex Score
22 records- 0191US9626011B2Rechargeable capacitive stylusWALTOP INT CORP·Filed 2015·Granted Apr 18, 2017·13 cites·15 claims
- 0281US11851325B2Methods for wafer bondingTAIWAN SEMICONDUCTOR MFG CO LTD·Filed 2019·Granted Dec 26, 2023·2 cites·20 claims
- 0380US12234145B2Methods for wafer bondingTAIWAN SEMICONDUCTOR MFG CO LTD·Filed 2023·Granted Feb 25, 2025·0 cites·20 claims
- 0472US9703401B2Portable electronic device and miniaturization rechargeable capacitive stylus thereofWALTOP INT CORP·Filed 2015·Granted Jul 11, 2017·2 cites·10 claims
- 0572USD417204SNotebook computerFIRST INT COMPUTER INC·Filed 1998·Granted Nov 30, 1999·19 cites·1 claims
- 0670US10564737B2Capacitive stylus with eraserWALTOP INT CORP·Filed 2018·Granted Feb 18, 2020·1 cites·10 claims
- 0770US2025154000A1Methods for wafer bondingTAIWAN SEMICONDUCTOR MFG CO LTD·Filed 2025·Application pending·0 cites
- 0867US10042444B2Capacitive stylus with two transmit electrodesWALTOP INT CORP·Filed 2016·Granted Aug 7, 2018·1 cites·11 claims
- 0953US10429956B2Capacitive stylus with detachable eraserWALTOP INT CORP·Filed 2018·Granted Oct 1, 2019·0 cites·8 claims
- 1048US2022209554A1Portable charging deviceWALTOP INT CORP·Filed 2021·Application pending·0 cites
- 1143US10895930B2Message erasing device and message erasing systemWALTOP INT CORP·Filed 2019·Granted Jan 19, 2021·0 cites·8 claims
- 1242US11023057B2Stylus structure having a barrier unit for contacting with a trigger componentWALTOP INT CORP·Filed 2020·Granted Jun 1, 2021·0 cites·4 claims
- 1342US10613647B2Portable electronic device and stylus thereofWALTOP INT CORP·Filed 2018·Granted Apr 7, 2020·0 cites·10 claims
- 1442US2020293124A1Pressure triggered stylus structureWALTOP INT CORP·Filed 2020·Application pending·0 cites
- 1541US10599272B2Portable electronic device and active capacitive stylus thereofWALTOP INT CORP·Filed 2017·Granted Mar 24, 2020·0 cites·10 claims
- 1640US2021117017A1Stylus structureWALTOP INT CORP·Filed 2020·Application pending·0 cites
- 1736US9606642B2Portable electronic device and miniaturization rechargeable capacitive stylus thereofWALTOP INT CORP·Filed 2015·Granted Mar 28, 2017·0 cites·9 claims
- 1836US2006290815A1Video signal displaying systemCHANG YI-CHIH·Filed 2005·Application pending·0 cites
- 1935US2017108953A1Capacitive stylus having adjustable pressure sensing structureWALTOP INT CORP·Filed 2015·Application pending·0 cites
- 2034US2017242501A1Capacitive stylus with replaceable conductive nibWALTOP INT CORP·Filed 2016·Application pending·0 cites
- 2133US2017108956A1Capacitive stylusWALTOP INT CORP·Filed 2015·Application pending·0 cites
- 2233US2017108962A1Capacitive whiteboard eraserWALTOP INT CORP·Filed 2015·Application pending·0 cites
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →