US PATENT SUBCLASS 700 / 12
.~.~ State of condition or parameter (e.g., on/off)

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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}
12.~.~ State of condition or parameter (e.g., on/off) {2}
13  DD  .~.~.~> Position responsive
14  DD  .~.~.~> Time responsive (duration) {2}