Christian Frei-krumme

3 Patents

• US120634782024

  Custom Hearing Device Equipped with Optical Sensors for Biometrical Sensing

  SONOVA AG

  0 cites
• US117925642023

  Hearing Device Comprising a Vent and an Acoustic Valve

  Sonova AG

  0 cites
• US116479502023

  Hearing Device with Optical Sensor at Spout

  SONOVA AG

  0 cites