Data processing: financial – business practice – management – or co – Automated electrical financial or business practice or... – Including point of sale terminal or electronic cash register
Reexamination Certificate
2008-07-22
2008-07-22
Zeender, F. (Department: 3627)
Data processing: financial, business practice, management, or co
Automated electrical financial or business practice or...
Including point of sale terminal or electronic cash register
C705S016000, C705S022000, C705S023000, C705S028000, C235S383000, C235S385000
Reexamination Certificate
active
07403909
ABSTRACT:
An electronic price label (ESL) system for performing asynchronous ESL transactions. An event notification technique allows a communication base station (CBS) manager to directly notify an ESL manager when responses from an ESL are received, without the ESL manager needing to constantly poll the CBS manager. In one aspect, an inter-process communication layer (IPC) to allow for such event notification by the CBS manager. When initially beginning operation, the ESL manager subscribes to a CBS manager's event and provides the name of a function in the ESL manager to be called when this event occurs. When the ESL manager instructs the CBS manager to send a message to an ESL, the CBS manager provides the ESL manager with a handle or unique identification number to identify the message. When a response is received from the ESL, the CBS manager “fires an event” utilizing the IPC and indicates the identification number of the response. When the event is fired, it serves as a notification to the ESL manager that the response is available for processing and the ESL manager looks up the original message using the unique identification number originally provided by the CBS manager. The response is then processed by a separate thread in the ESL manager.
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Edwards, III Gordon Lee
Haulk Kevin Winton
NCR Corporation
Priest & Goldstein PLLC
Thein M.
Zeender F.
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