US PATENT SUBCLASS 455 / FOR 115
.~.~.~.~ With service request and response (455/54.2)

Current as of: June, 1999
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455 /   HD   TELECOMMUNICATIONS

899  DF  MISCELLANEOUS {5}
FOR 106  DF  .~ Plural transmitters or receivers (i.e., more than two stations) (455/49.1) {4}
FOR 113  DF  .~.~ With central station (e.g., master, etc.) (455/53.1) {2}
FOR 114  DF  .~.~.~ To or from mobile station (455/54.1) {3}
FOR 115.~.~.~.~ With service request and response (455/54.2)

DEFINITION

Classification: 455/FOR.115

With service request and response:

Foreign art collection in which one station sends a request signal to another station and waits for an answer to start an operation.