A fastener which enables the attachment of an article to a panel having front and rear surfaces and an aperture formed therebetween, particularly in cases where access to the panel is limited to one side only. The fastener includes a stud having a head and a shank, a spring mounted upon said stud, and...http://www.google.ca/patents/US5316422?utm_source=gb-gplus-sharePatent US5316422 - Blind fastener
