Inventor
QIAN LIUJIAN
US5 patents
Patents
5 patentsUS7376636B1May 20, 2008
Geocoding using a relational database
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US7162470B2Jan 9, 2007
Contextual search interface for business directory services
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US10255293B2Apr 9, 2019
Generating virtual map tiles according to an ad hoc specification
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US10042863B2Aug 7, 2018
Automatic update for map cache
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US12061784B2Aug 13, 2024
Generating aggregate data geospatial grid cells for encoding in vector tiles
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