US PATENT SUBCLASS 700 / 18
.~.~.~ Specific programming (e.g., relay or ladder logic)


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700 /   HD   DATA PROCESSING: GENERIC CONTROL SYSTEMS OR SPECIFIC APPLICATIONS

1  DD  GENERIC CONTROL SYSTEM, APPARATUS OR PROCESS {15}
11  DD  .~ Sequential or selective {7}
17  DD  .~.~ Operator interface (e.g., display with control) {1}
18.~.~.~ Specific programming (e.g., relay or ladder logic)