http://www.teamsteverhyner.com/keepkey-and-trezor-bitcoin-vaults-in-your-pocket/

SatoshiLabs presented Trezor in the summertime of 2014. It was the first equipment wallet or so-calledcold storage ever which offered the unprecedented possibility to keep all private keys offline. That was fairly a technology in the crypto safety and security room. KeepKey launched its purse in September this year.