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US16125761B   [0014]  [0015]  [0017]  [0018]  [0019]  [0034]  [0035]  [0068]  [0068] 
US16420141B   [0016]  [0017]  [0018]  [0019]  [0033]  [0068] 
US16420190B   [0016]  [0017]  [0018]  [0019]  [0034]  [0068] 
WO16125761A   [0035]  [0037] 
WO16420190A   [0036]  [0036]  [0037] 
US16420184B   [0063]  [0068] 

Achieving centimeter-accuracy indoor localization on Wi-Fi platforms: a multi-antenna approach   [0020] 
Time-reversed acoustic   [0020]