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Inventor
EFFERTZ GRANT W
US
2 patents
Patents
2 patents
US11200353B2
Dec 14, 2021
Geographic information system for creating 3D structure models using perspective view drafting
GEOSPAN CORP
4 citations
63
US12566899B2
Mar 3, 2026
Shared geographic information system for creation, change management and delivery of 3D structure models
GEOSPAN CORP
0 citations
53