US Patent 9582793 Point of sale system, inventory system, and methods thereof

A method for conducting a purchase transaction using a wireless communication device, includes: receiving from a mobile application module executing on a wireless communication device instructions to initiate a purchase transaction by a server application; verifying and authorizing the mobile application module by the server application; receiving from the mobile application module identification information about an item to be purchased to the server application; retrieving via the server application at least one of price and product information based on the identification information; and completing the purchase transaction by automatically electronically debiting a user account.