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A
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SECTION A — HUMAN NECESSITIES
B
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SECTION B — PERFORMING OPERATIONSTRANSPORTING
C
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SECTION C — CHEMISTRYMETALLURGY
D
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SECTION D — TEXTILESPAPER
E
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SECTION E — FIXED CONSTRUCTIONS
F
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SECTION F — MECHANICAL ENGINEERINGLIGHTINGHEATINGWEAPONSBLASTING
G
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SECTION G — PHYSICS
G01
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INSTRUMENTS
G01
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MEASURINGTESTING
G02
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OPTICS
G02B
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OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS (G02F takes precedence; optical elements specially adapted for use in lighting devices or systems thereof F21V 1/00-F21V 13/00; measuring-instruments, see the relevant subclass of class G01, e.g. optical rangefinders G01C; testing of optical elements, systems, or apparatus G01M 11/00; spectacles G02C; apparatus or arrangements for taking photographs or for projecting or viewing them G03B; sound lenses G10K 11/30; electron and ion "optics" H01J; X-ray "optics" H01J, H05G 1/00; optical elements structurally combined with electric discharge tubes H01J 5/16, H01J 29/89, H01J 37/22; microwave "optics" H01Q; combination of optical elements with television receivers H04N 5/72; optical systems or arrangements in colour television systems H04N 9/00; heating arrangements specially adapted for transparent or reflecting areas H05B 3/84) [1, 7]
G02B 1/00
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Optical elements characterised by the material of which they are made (compositions of optical glasses C03C 3/00)Optical coatings for optical elements
G02B 3/00
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Simple or compound lenses (artificial eyes A61F 2/14; spectacle lenses or contact lenses for the eyes G02C; watch or clock glasses G04B 39/00)
G02B 5/00
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Optical elements other than lenses (light guides G02B 6/00; optical logic elements G02F 3/00) [4]
G02B 6/00
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Light guidesStructural details of arrangements comprising light guides and other optical elements, e.g. couplings [4, 6]
G02B 6/02
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Optical fibre with cladding (mechanical structures for providing tensile strength and external protection G02B 6/44) [4, 2006.01]
G02B 6/024
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. . with polarisation-maintaining properties [2006.01]
G02B 6/028
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. . with core or cladding having graded refractive index [2006.01]
G02B 6/032
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. . with non-solid core or cladding [2006.01]
G02B 6/036
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. . core or cladding comprising multiple layers [2006.01]
G02B 6/04
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formed by bundles of fibres (G02B 6/24 takes precedence) [4]
G02B 6/06
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. . the relative position of the fibres being the same at both ends, e.g. for transporting images [4]
G02B 6/08
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. . . with fibre bundle in form of plate [4]
G02B 6/10
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of the optical waveguide type (G02B 6/02, G02B 6/24 take precedence; devices or arrangements for the control of light by electric, magnetic, electro-magnetic or acoustic means G02F 1/00; transferring the modulation of modulated light G02F 2/00; optical logic elements G02F 3/00; optical analogue/digital converters G02F 7/00; stores using opto-electronic devices G11C 11/42; electric waveguides H01P; transmission of information by optical means H04B 10/00; multiplex systems H04J 14/00) [4, 2006.01]
G02B 6/12
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. . of the integrated circuit kind (production or processing of single crystals C30B; electric integrated circuits H01L 27/00) [4]
G02B 6/122
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. . . Basic optical elements, e.g. light-guiding paths [6]
G02B 6/124
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. . . . Geodesic lenses or integrated gratings [6]
G02B 6/125
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. . . . Bends, branchings or intersections [6]
G02B 6/126
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. . . using polarisation effects [6]
G02B 6/13
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. . . Integrated optical circuits characterised by the manufacturing method [6]
G02B 6/132
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. . . . by deposition of thin films [6]
G02B 6/134
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. . . . by substitution by dopant atoms [6]
G02B 6/136
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. . . . by etching [6]
G02B 6/138
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. . . . by using polymerisation [6]
G02B 6/14
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. . Mode converters [4]
G02B 6/24
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Coupling light guides (for electric waveguides H01P 1/00) [4, 5]
G02B 6/245
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. . Removing protective coverings of light guides before coupling [5]
G02B 6/25
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. . Preparing the ends of light guides for coupling, e.g. cutting [5]
G02B 6/255
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. . Splicing of light guides, e.g. by fusion or bonding [5]
G02B 6/26
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. . Optical coupling means (G02B 6/36, G02B 6/42 take precedence) [4]
G02B 6/27
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. . . with polarisation selective and adjusting means (polarisation elements in general G02B 5/30; polarisation systems in general G02B 27/28; optical polarisation multiplex systems H04J 14/06) [6]
G02B 6/28
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. . . having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals [4]
G02B 6/287
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. . . . Structuring of light guides to shape optical elements with heat application (G02B 6/255 takes precedence) [6]
G02B 6/293
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. . . . with wavelength selective means (for optical elements in use, see the relevant subgroups of this subclass; optical wavelength-division multiplexing systems H04J 14/02) [6]
G02B 6/30
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. . . for use between fibre and thin-film device [4]
G02B 6/32
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. . . having lens focusing means [4]
G02B 6/34
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. . . utilising prism or grating [4]
G02B 6/35
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. . . having switching means (optical switching in general G02B 26/08; by changing the optical properties of the medium G02F 1/00) [6]
G02B 6/36
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. . Mechanical coupling means (G02B 6/255, G02B 6/42 take precedence) [4, 5]
G02B 6/38
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. . . having fibre to fibre mating means [4]
G02B 6/40
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. . . having fibre bundle mating means [4]
G02B 6/42
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. . Coupling light guides with opto-electronic elements [4]
G02B 6/43
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. . . Arrangements comprising a plurality of opto-electronic elements and associated optical interconnections (light-emissive or light-sensitive semiconductor devices H01L 27/00, H01L 31/00, H01L 33/00; semiconductor lasers monolithically integrated with other components H01S 5/026) [6]
G02B 6/44
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Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables (cables incorporating electric conductors and optical fibres H01B 11/22) [4]
G02B 6/46
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Processes or apparatus adapted for installing optical fibres or optical cables (installation of cables containing electric conductors and optical fibres H02G) [6]
G02B 6/48
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. . Overhead installation [6]
G02B 6/50
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. . Underground or underwater installationInstallation through tubing, conduits or ducts [6]
G02B 6/52
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. . . using fluid, e.g. air [6]
G02B 6/54
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. . . using mechanical means, e.g. pulling or pushing devices [6]
G02B 7/00
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Mountings, adjusting means, or light-tight connections, for optical elements
G02B 9/00
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Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – (G02B 13/00, G02B 15/00 take precedence)
G02B 11/00
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Optical objectives characterised by the total number of simple and compound lenses forming the objective and their arrangement (G02B 9/00 takes precedence; having only one simple lens G02B 3/00)
G02B 13/00
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Optical objectives specially designed for the purposes specified below (with variable magnification G02B 15/00)
G02B 15/00
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Optical objectives with means for varying the magnification (anamorphotic objectives G02B 13/08)
G02B 17/00
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Systems with reflecting surfaces, with or without refracting elements (microscopes G02B 21/00; telescopes, periscopes G02B 23/00; beam shaping not otherwise provided for G02B 27/09; for beam splitting or combining G02B 27/10; for optical projection G02B 27/18) [6]
G02B 19/00
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Condensers (for microscopes G02B 21/08)
G02B 21/00
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Microscopes (eyepieces G02B 25/00; polarising systems G02B 27/28; measuring microscopes G01B 9/04; microtomes G01N 1/06;  scanning-probe techniques or apparatus G01Q) [1, 7]
G02B 23/00
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Telescopes, e.g. binoculars (measuring telescopes G01B 9/06)PeriscopesInstruments for viewing the inside of hollow bodies (diagnostic instruments A61B)Viewfinders (objectives G02B 9/00, G02B 11/00, G02B 15/00, G02B 17/00; eyepieces G02B 25/00)Optical aiming or sighting devices (non-optical aspects of weapon aiming or sighting devices F41G) [4]
G02B 25/00
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EyepiecesMagnifying glasses (simple lenses G02B 3/00)
G02B 26/00
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Optical devices or arrangements using movable or deformable optical elements for controlling the intensity, colour, phase, polarisation or direction of light, e.g. switching, gating, modulating (mechanically operable parts of lighting devices for the control of light order F21V; specially adapted for measuring characteristics of light G01J; devices or arrangements, the optical operation of which is modified by changing the optical properties of the medium of the devices or arrangements G02F 1/00; control of light in general G05D 25/00; control of light sources H01S 3/10, H05B 37/00-H05B 43/00) [4]
G02B 27/00
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Other optical systemsOther optical apparatus (means for bringing-about special optical effects in shop-windows, showcases A47F, e.g. A47F 11/06; optical toys A63H 33/22; designs or pictures characterised by special light effects B44F 1/00)
G02C
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SPECTACLESSUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLESCONTACT LENSES
G02F
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DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATINGTECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOFFREQUENCY-CHANGINGNON-LINEAR OPTICSOPTICAL LOGIC ELEMENTSOPTICAL ANALOGUE/DIGITAL CONVERTERS [2, 4]
G03
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PHOTOGRAPHYCINEMATOGRAPHYANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVESELECTROGRAPHYHOLOGRAPHY [4]
G04
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HOROLOGY
G05
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CONTROLLINGREGULATING
G06
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COMPUTINGCALCULATINGCOUNTING
G07
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CHECKING-DEVICES
G08
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SIGNALLING
G09
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EDUCATINGCRYPTOGRAPHYDISPLAYADVERTISINGSEALS
G10
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MUSICAL INSTRUMENTSACOUSTICS
G11
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INFORMATION STORAGE
G12
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INSTRUMENT DETAILS
G21
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NUCLEONICS
G21
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NUCLEAR PHYSICSNUCLEAR ENGINEERING
G99
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SUBJECT MATTER NOT OTHERWISE PROVIDED FOR IN THIS SECTION [2006.01]
H
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SECTION H — ELECTRICITY

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