What's old is new again: http://articles.sun-sentinel.com/1992-03-30/business/9201310294_1_device-caid-locator

No LED light, of course, but same exact idea.

I have a couple of the original ones here on a shelf...
_________________________
Doug Ritter
Editor
Equipped To SurviveŽ
Chairman & Executive Director
Equipped To Survive Foundation
www.KnifeRights.org
www.DougRitter.com