| 359 / | HD | OPTICS: SYSTEMS (INCLUDING COMMUNICATION) AND ELEMENTS |
| 642 | DF | LENS {32} |
| 804 | ![]() | .~ With viewed object support {3} |
| 805 | DF | .~.~> On lens supporting handle |
| 806 | DF | .~.~> Relatively movable informatory sheet and lens (e.g., reading machine, etc.) |
| 807 | DF | .~.~> Flat opaque document or picture |