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Dropping a smartphone is a disaster. No matter how careful you are, it will slip out of your hands or off your lap easily. http://www.dsstyles.com/news/2013/apple-patents-an-protective-system-to-save-devices-from-dropping.html?utm_source=blog&utm_medium=luuux&utm_campaign=feedburner0313 for its devices. It aims to protect the device from free falling on the ground when the mechanisms are activated by free falling. There are some air bags equipped by providing air resistant for slowing the dropping speed. Also, there are a system to alter the centre of gravity of the device so as to prevent the important parts of the phone from being crashed. apple