The University of Aizu has been granted a patent for a technology invented by Prof.Julian Villegas and Prof.Anh T. Pham.

A patent has been granted for an indoor navigation system using near-ultrasound signals invented by Prof.Julian Villegas and Prof.Anh T. Pham of the University of Aizu.
Please see the demonstration on YouTube for reference.
https://www.youtube.com/watch?v=uw3F9LJkTo0

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Title of the invention : The indoor location system, portable terminal, and computer program.
Inventor : Julián Villegas (Computer Arts Laboratory)(※1)
     Anh T. Pham (Computer Communications Lab)(※2)
Filing date : August. 25, 2017[Application number] 2017-162242
Registration date : November. 5, 2021[Patent number] Japanese Patent No. 6971467
Link to patent : https://www.j-platpat.inpit.go.jp/c1800/PU/JP-6971467/CBE66A710B20ADE7093E27C15E61D97AC98F75516F3A6BF19DE9129A65006982/15/ja