Today is the parking meter's 75th birthday. A little known OKC gift to the world. I think I'll pass on the cake though, they've cost me a lot of money in tickets over the years...

May 13, 1935: Enter the Parking Meter | This Day In Tech | Wired.com (http://www.wired.com/thisdayintech/2010/05/0513parking-meter-patent/)