Abstract: A card reader device using a mobile and the method thereof is introduced. The mobile is adopted to supply electric power through audio output jack, and to transmit card data applied from the card reader device via microphone input jack. The card reader unit is connected to the audio jack of the mobile, and offers card data read by the card reader units via microphone input of the mobile. The card reader device comprises a contact type card reader unit to read cards with magnetic strips, and a contactless type card reader unit for contactless smart cards. The card reader device of the present invention enables and simplifies card transaction through mobile devices, and the reader is combinable with any mobiles with audio jack only.

Abstract: The present invention discloses a bank transaction method linking accounts via common accounts, wherein the existing accounts of the account holder and/or newly opened plural accounts link arbitrarily as defined by the account holder for convenient transactions between account holder's primary account and other's secondary accounts without using account numbers of the concerned accounts. To fulfill, the purpose, the present invention enables the account holder to make transactions on a primary account as well on linked secondary accounts in real time; and the said primary and secondary accounts are also offered for independent transaction as ordinary bank accounts. In addition, the classification and management of the said primary and secondary accounts are attainable through the individual account number with specified account code given by the bank to achieve transactions between the said primary and secondary accounts while implementing the conventional banking system.

Abstract: The present invention discloses a bank transaction system linking accounts via common accounts, wherein the existing accounts of the account holder and/or newly opened plural accounts link arbitrarily as defined by the account holder for convenient transactions between account holder's primary account and other's secondary accounts without using account numbers of the concerned accounts. To fulfill the purpose, the present invention enables the account holder to make transactions on a primary account as well on linked secondary accounts in real time; and the said primary and secondary accounts are also offered for independent transaction as ordinary bank accounts. In addition, the classification and management of the said primary and secondary accounts are attainable through the individual account number with specified account code given by the bank to achieve transactions between the said primary and secondary accounts while implementing the conventional banking system.

Abstract: The present invention discloses a bank transaction method linking accounts via common accounts, wherein the existing accounts of the account holder and/or newly opened plural accounts link arbitrarily as defined by the account holder for convenient transactions between account holder's primary account and other's secondary accounts without using account numbers of the concerned accounts. To fulfill, the purpose, the present invention enables the account holder to make transactions on a primary account as well on linked secondary accounts in real time; and the said primary and secondary accounts are also offered for independent transaction as ordinary bank accounts. In addition, the classification and management of the said primary and secondary accounts are attainable through the individual account number with specified account code given by the bank to achieve transactions between the said primary and secondary accounts while implementing the conventional banking system.