Published September 17, 2004

...See car with C-Car. Two physicists walk into a bar, and when they walk out, they are able to find their car!
No, that's the punch line. Two Austin physicists, Slav and Tatiana Lagui, have invented a device to help consumers find their cars.
So everyone who does not drive a recognizable car like a Hummer or Ferrari can discern their Accord from the hundreds of others at the parking lot in the mall.
C-Car uses magnets to point you in the direction where you last left your car, which could come in handy at a sports event or concert.
The device, marketed under the name C-Car is sold through Austin-based Lancetta Inc. on its Web site at (www.lancetta-inc.com) and eBay. The key-chain device costs $4.95 and works using magnets, so needs no batteries.
However, the magnets use the metal contents of the car to work its magic, so carrying a pocketknife, or having a steel plate in your body will interfere with the car-finding miracle.

http://austin.bizjournals.com/austin/stories/2004/09/20/tidbits1.html?page=2