359 / | HD | OPTICS: SYSTEMS (INCLUDING COMMUNICATION) AND ELEMENTS |
515 | DF | SIGNAL REFLECTOR {11} |
534 | DF | .~ Including a curved refracting surface {4} |
543 | .~.~ With individual reflector element mount {2} | |
544 | DF | .~.~.~> Including a snap, spring clip, or spring retainer |
545 | DF | .~.~.~> Including a threaded member |