Inventor · disambiguated record
Chung-Ren Chang
Also filed as: CHANG CHUNG-REN
3 granted patents·0 citations·filing 2018–2022
37Inventor score
Files withAD II ENG INC3
Top patents by PatentIndex Score
3 records- 0151US11814132B1Bicycle operating deviceAD II ENG INC·Filed 2022·Granted Nov 14, 2023·0 cites·10 claims
- 0243US12409911B2Bicycle operating deviceAD II ENG INC·Filed 2022·Granted Sep 9, 2025·0 cites·10 claims
- 0335US10894576B2Bicycle rear derailleurAD II ENG INC·Filed 2018·Granted Jan 19, 2021·0 cites·8 claims
Join the waitlist — get patent alerts
Get an alert when Chung-Ren Chang 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 →