- Optical instruments and apparatus (2)
- Glasses, field or opera (1)
- Gun sights, optical (1)
- Lenses, optical: all types except ophthalmic (2)
- Microscopes, except electron, proton, and corneal (1)
- Spyglasses (1)
- Telescopes: elbow, panoramic, sighting, fire control, etc. (1)
- Fuse setters (1)
- Gratings, diffraction (1)
- Light sources, standard (1)
- Optical alignment and display instruments (1)
- Optical test and inspection equipment (2)
