The present invention provides apparatus and methods for treating the beaks of poultry to prevent further growth by non-contact heating while protecting the birds' tongues. The birds' tongues are protected by providing pressure on underside of the lower beak of the bird, proximate the base of the lower...http://www.google.fr/patents/US7363881?utm_source=gb-gplus-shareBrevet US7363881 - Beak treatment with tongue protection
