| ReturnTo Theme-Group-Choice | Onelevelup |
| 2H039 | Telescopes | |
| G02B23/00 -23/22 | ||
| G02B23/00-23/22 | AA | AA00 TYPES |
AA01 | AA02 | AA03 | AA04 | AA05 | AA06 | AA07 | AA08 | AA09 | AA10 |
| . Telescopes | . . Reflecting telescopes | . . Sightseeing telescopes | . Binoculars | . . Prism binoculars | . . Biaxial binoculars | . Periscopes | . Doubling as magnifying glasses | . Doubling as microscopes | . Doubling as viewfinders | |||
| AB | AB00 STRUCTURE |
AB01 | AB02 | AB03 | AB04 | AB05 | AB06 | AB07 | ||||
| . Optical systems (AB63 takes precedence) | . . Controlling optical flux | . . . Splitting optical flux | . . . Synthesizing optical flux | . . . Switching optical paths | . . . . Switching the eyepiece position | . . . . Switching the direction of view | ||||||
| AB12 | AB13 | AB14 | AB15 | AB16 | AB17 | |||||||
| . . Adjusting, regulating optical systems | . . . Adjusting visibility | . . . Adjusting the focal point | . . . Variable magnification | . . . Adjusting the optical axis | . . . Adjusting the amount of light | |||||||
| AB22 | AB23 | AB24 | ||||||||||
| . . Variants having prisms, reflecting mirrors | . . . Prism support, adjustment | . . . Reflecting mirror support, adjustment | ||||||||||
| AB32 | ||||||||||||
| . . Image stabilizing optical systems | ||||||||||||
| AB41 | AB42 | AB43 | AB44 | AB45 | AB46 | AB47 | AB48 | AB49 | ||||
| . Mechanical structure | . . Housings | . . . Collapsible | . . . Capable of being assembled, taken apart | . . . Telescoping | . . . Body-mountable | . . . Lens caps, hoods | . . . Barrel covers | . . . Attachments for camera replacement lenses | ||||
| AB52 | AB53 | AB54 | AB55 | AB56 | AB57 | |||||||
| . . Barrel support | . . . Tripods | . . . Vibration damping apparatuses | . . . Mounting on cameras | . . . Equatorial telescopes | . . . . Drive devices for telescope barrels | |||||||
| AB61 | AB62 | AB63 | AB64 | AB65 | AB66 | AB67 | AB68 | AB69 | ||||
| . Sighting devices | . . Mounting of sighting devices | . . Viewfinder-optical systems | . . Polar axis viewfinders | . . For weaponry (e.g., rifle scopes) | . . . Focusing plates | . . . . Illumination of focusing plates | . . . Adjusting sighting | . . . Inner barrel support, adjustment | ||||
| AC | AC00 VARIANTS HAVING SPECIFIC FUNCTIONS |
AC01 | AC02 | AC03 | AC04 | AC05 | AC06 | AC07 | AC08 | AC09 | ||
| . Clocks | . Direction | . Projection | . Cameras | . Radios | . Image intensifiers | . Waterproofing, dustproofing, underwater use | . Display | . . Variants that can display in the field of view |