An ear warmer comprises a set of membranes and a frame. The set of membranes collectively defines an outer perimeter. The set of membranes is attached along the outer perimeter to define an attachment portion. The attachment portion is entirely disposed within an interior of the set of membranes. The...http://www.google.es/patents/US20050246815?utm_source=gb-gplus-sharePatente US20050246815 - Apparatus and method for making an ear warmer and an ear warmer frame
Apparatus and method for making an ear warmer and an ear warmer frame
