Assignee
HANGZHOU DANA TECH INC
CN·8 granted patents·1 pending application·7 citations·filing 2019–2021
Top patents by PatentIndex Score
9 records- 0184US11508251B2Method and system for intelligent identification and correction of questionsHANGZHOU DANA TECH INC·Filed 2019·Granted Nov 22, 2022·6 cites·14 claims
- 0280US11823358B2Handwritten content removing method and device and storage mediumHANGZHOU DANA TECH INC·Filed 2020·Granted Nov 21, 2023·1 cites·13 claims
- 0363US11521506B2Calculation practicing method, system, electronic device and computer readable storage mediumHANGZHOU DANA TECH INC·Filed 2019·Granted Dec 6, 2022·0 cites·18 claims
- 0458US11749128B2Answer correction method and deviceHANGZHOU DANA TECH INC·Filed 2019·Granted Sep 5, 2023·0 cites·17 claims
- 0548US12424008B2Object recognition processing method, processing apparatus, electronic device, and storage mediumHANGZHOU DANA TECH INC·Filed 2021·Granted Sep 23, 2025·0 cites·13 claims
- 0645US11721229B2Question correction method, device, electronic equipment and storage medium for oral calculation questionsHANGZHOU DANA TECH INC·Filed 2019·Granted Aug 8, 2023·0 cites·22 claims
- 0741US11450081B2Examination paper correction method and apparatus, electronic device, and storage mediumHANGZHOU DANA TECH INC·Filed 2020·Granted Sep 20, 2022·0 cites·8 claims
- 0841US2020286402A1Method and system for assisting with math problemHANGZHOU DANA TECH INC·Filed 2019·Application pending·0 cites
- 0940US11410407B2Method and device for generating collection of incorrectly-answered questionsHANGZHOU DANA TECH INC·Filed 2019·Granted Aug 9, 2022·0 cites·11 claims
Join the waitlist — get patent alerts
Get an alert when HANGZHOU DANA TECH INC 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 →