US 7,372,971 B2
Hearing device with fuel cell
Hans-Ueli Roeck, Hombrechtikon (Switzerland)
Assigned to Phonak AG, Stafa (Switzerland)
Filed on Jan. 12, 2004, as Appl. No. 10/755,214.
Prior Publication US 2005/0152568 A1, Jul. 14, 2005
Int. Cl. H04R 25/00 (2006.01)
U.S. Cl. 381—323  [381/322; 381/324] 8 Claims
OG exemplary drawing
 
1. A hearing device comprising at least a signal processing unit and at least a fuel cell to supply the signal processing unit with energy, said fuel cell comprising a fuel tank comprising a volume for storing therein fuel fluid to be used by the fuel cell, whereby said fuel tank comprising a membrane or an area with micro openings to let fuel fluid to be used by the fuel cell pass into the fuel tank.