Inventor

KOENECKE FRED

DE3 patents

Patents

3 patents

US7639832B2Dec 29, 2009

Headphones

SENNHEISER ELECTRONIC11 citations81

USD582341SDec 9, 2008

Rechargeable battery

SENNHEISER ELECTRONIC5 citations56

USD540311SApr 10, 2007

Headphone container

SENNHEISER ELECTRONIC1 citations45