- Optical instruments and apparatus (7)
- Gun sights, optical (2)
- Lenses, optical: all types except ophthalmic (3)
- Magnifying instruments, nec, optical (1)
- Microprojectors (1)
- Microscopes, except electron, proton, and corneal (2)
- Telescopes: elbow, panoramic, sighting, fire control, etc. (3)
- Optical alignment and display instruments (1)
- Optical elements and assemblies, except ophthalmic (2)
