A hot and cold therapeutic pillow which includes a cervical roll having relatively firm ends and a relatively soft middle portion. The core of the pillow is hollow and accommodates a cylindrical gel pack which may be heated by microwave radiation or cooled by freezing. The cervical roll may be integrally...http://www.google.sh/patents/US5545199?utm_source=gb-gplus-sharePatent US5545199 - Hot and cold therapeutic pillow
