Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Reexamination Certificate
2011-03-01
2011-03-01
Vu, Thong H (Department: 2465)
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
C709S203000
Reexamination Certificate
active
07899070
ABSTRACT:
A system for process control comprises a server digital data processor and a client digital data processor that are coupled by a network, such as the Internet or an Intranet. The server digital data processor, which is additionally coupled to a control/sensing device and any associated interface equipment (collectively, referred to as “process control apparatus”), includes a command processor that transfers information between the network and the process control apparatus. The client digital data processor includes an information client (e.g., a so-called Internet web browser) capable of requesting and receiving an applet from the server digital data processor. The information client, further, defines a hardware-independent and operating system-independent virtual machine environment within the client digital data processor. The client digital data processor executes, within that virtual machine environment, an applet for configuring the client digital data processor as a “process controller” that establishes communications over the network with the command processor and that monitors and/or controls the process control apparatus via those communications.
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Canna Bruce S.
Couper Gerald S.
Thibault Richard L.
Invensys Systems Inc.
Nutter & McClennen & Fish LLP
Powsner David J.
Vu Thong H
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