Jon Grane Madsen

3 Patents

• US125568652026

  Headband and a Method for Producing the Headband

  GN AUDIO A/S

  0 cites
• US120286742024

  On-ear Headphones with Staggered Perforations

  GN AUDIO A/S

  0 cites
• US116898572023

  Headband and a Method for Producing the Headband

  GN AUDIO A/S

  0 cites