DIFF Main Group
G02B 23/00 Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
Introduced: September 1968
Additional Content IPC
Measuring telescopes Diagnostic instruments
IPC and CPC are identically structured here. All 5 subcodes exist in both systems.
2 shared codes have differing titles between IPC and CPC.
Child Classifications
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- G02B 23/02 involving prisms or mirrors (G02B23/14 takes precedence) IPC+CPC Available in IPC and CPC
- G02B 23/12 with means for image conversion or intensification +1 CPC IPC+CPC Available in IPC and CPC
- G02B 23/14 Viewfinders (for photographic apparatus G03B13/02) +1 CPC IPC+CPC Available in IPC and CPC
- G02B 23/16 Housings; Caps; Mountings; Supports, e.g. with counterweight +1 CPC IPC+CPC Available in IPC and CPC
- G02B 23/24 Instruments for viewing the inside of hollow bodies, e.g. fibrescopes since 1985 +2 CPC IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class G02,2013–2023, worldwide · Source: EPO PATSTAT
- BOE TECHNOLOGY GROUP COMPANY 13,460
- BOE TECHNOLOGY GROUP COMPANY CN 11,745
- SAMSUNG DISPLAY KR 10,908
- CANON 9,072
- FUJIFILM JP 7,957
- SAMSUNG ELECTRONICS COMPANY KR 7,805
- LG DISPLAY COMPANY KR 6,558
- CHINESE ACADEMY OF SCIENCES 5,855
- NITTO DENKO CORPORATION JP 5,817
- OLYMPUS CORPORATION JP 4,579
Top Applicants (CPC)
Class G02,2013–2023, worldwide · Source: EPO PATSTAT
- SAMSUNG DISPLAY KR 14,409
- BOE TECHNOLOGY GROUP COMPANY CN 14,236
- BOE TECHNOLOGY GROUP COMPANY 11,826
- SAMSUNG ELECTRONICS COMPANY KR 10,141
- FUJIFILM JP 8,506
- LG DISPLAY COMPANY KR 7,558
- NITTO DENKO CORPORATION JP 6,306
- OLYMPUS CORPORATION JP 5,336
- SONY CORPORATION JP 5,097
- CANON JP 4,814