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| Number | Title | Issue Date |
| 7412229 | Sales apparatus and method of transmitting and receiving merchandise information by electric field induced in human body The button apparatus is an apparatus provided for, for example, a vending machine and to be touched and pressed with the body of a user who wants to purchase a commodity from the vending machine. By pressing down the button apparatus, the user can purchase a require... | 08/12/2008 |
