This invention relates to emergency flotation devices, particularly to a wearable device in the form of a collar; and most particularly to a device suitable for wear by a pet or young child which may be worn during watersports, and which will not deploy until predetermined nominal safety parameters have...http://www.google.sh/patents/US6843694?utm_source=gb-gplus-sharePatent US6843694 - Wearable emergency flotation device
