Assignee
SHANDONG LANBEISITE EDUCATIONAL EQUIPMENT GROUP
CN·2 granted patents·1 pending application·3 citations·filing 2019–2022
Top patents by PatentIndex Score
3 records- 0172US11137899B2Liquid crystal writing film, partial erasing method, multi-voltage output circuit and positioning system capable of partial erasingSHANDONG LANBEISITE EDUCATIONAL EQUIPMENT GROUP·Filed 2019·Granted Oct 5, 2021·3 cites·6 claims
- 0255US12504658B2Liquid crystal handwriting board, handwriting apparatus, and handwriting systemSHANDONG LANBEISITE EDUCATIONAL EQUIPMENT GROUP·Filed 2022·Granted Dec 23, 2025·0 cites·19 claims
- 0333US2023176436A1Liquid crystal writing apparatus and method for implementing local erasure by using lightSHANDONG LANBEISITE EDUCATIONAL EQUIPMENT GROUP·Filed 2021·Application pending·0 cites
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