235 / | HD | REGISTERS |
435 | DF | CODED RECORD SENSORS {9} |
439 | DF | .~ Particular sensor structure {8} |
454 | DF | .~.~ Optical {10} |
462.01 | DF | .~.~.~ Bar code {20} |
462.2 | .~.~.~.~ Aiming or positioning adjunct (e.g., viewfinder, pointer, or positioning aid) {1} | |
462.21 | DF | .~.~.~.~.~> Using spotter beam |