05221838 is referenced by 627 patents and cites 14 patents.

An electronic wallet includes memory for storing at least a balance corresponding to an account in a financial institution, and a selective call receiver for receiving a wireless message transmitted from a remote transmitter, the wireless message including financial information relating to the balance for confirming a financial transaction with the financial institution. A controller, coupled to the memory and to the receiver, can update the balance in the memory in response to the wireless message.

communication system enters financial transactions into the communication system from one of a plurality of associated portable data devices, and updates the financial transactions from the communication system to the one and to at least a second of the plurality of associated portable data devices via wireless message communication from at least one remote transmitter.

Title
Electronic wallet
Application Number
632714
Publication Number
5221838
Application Date
October 20, 1992
Publication Date
June 22, 1993
Inventor
Larry Puhl
Sleepy Hollow
IL, US
Louis D Finkelstein
Wheeling
IL, US
Jim Wright
Coral Springs
FL, US
Jose Gutman
Boynton Beach
FL, US
Agent
Thomas G Berry
William E Koch
Jose Gutman
Assignee
Motorola
IL, US
IPC
G06F 15/30
View Original Source