<p>A safety device which includes at least one container (86) which is made from a material (92) which exhibits at least a degree of gas imperviousness at least when wet, and a substance which, when contacted by water, evolves a gas which imparts buoyancy to the container.</p>
申请公布号
WO2009143537(A9)
申请公布日期
2011.07.14
申请号
WO2009ZA00042
申请日期
2009.05.19
申请人
BARTELINK, JOHANNES, GERHARDUS;WHATMORE, GREGORY, JAY
发明人
BARTELINK, JOHANNES, GERHARDUS;WHATMORE, GREGORY, JAY
