Assignee
CHANG PO YEN
TW·1 granted patent·3 pending applications·0 citations·filing 2018–2022
Top patents by PatentIndex Score
4 records- 0138US12186861B2Spark plug wrenchCHANG PO YEN·Filed 2022·Granted Jan 7, 2025·0 cites·8 claims
- 0237US2021078142A1Slide toolCHANG PO YEN·Filed 2019·Application pending·0 cites
- 0332US2020180121A1Reversible wrenchCHANG PO YEN·Filed 2018·Application pending·0 cites
- 0432US2020147762A1Two-way retractable socketCHANG PO YEN·Filed 2018·Application pending·0 cites
Join the waitlist — get patent alerts
Get an alert when CHANG PO YEN files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →