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chemistry (74) 74
physics (55) 55
science & technology (55) 55
physical sciences (45) 45
optics (37) 37
optical elements, systems, or apparatus (30) 30
organic chemistry (29) 29
chemistry, multidisciplinary (27) 27
heterocyclic compounds (27) 27
devices or arrangements, the optical operation of which ismodified by changing the optical properties of the medium of thedevices or arrangements for the control of the intensity,colour, phase, polarisation or direction of light, e.g.switching, gating, modulating or demodulating (26) 26
dyes (26) 26
frequency-changing (26) 26
metallurgy (26) 26
non-linear optics (26) 26
optical analogue/digital converters (26) 26
optical logic elements (26) 26
techniques or procedures for the operation thereof (26) 26
adhesives (25) 25
materials for miscellaneous applications, not provided forelsewhere (25) 25
miscellaneous applications of materials (25) 25
miscellaneous compositions (25) 25
natural resins (25) 25
paints (25) 25
polishes (25) 25
chemistry, physical (17) 17
materials science (17) 17
materials science, multidisciplinary (17) 17
photochromism (17) 17
technology (17) 17
cinematography (15) 15
compositions based thereon (15) 15
contact lenses (15) 15
electrography (15) 15
general tagging of cross-sectional technologies spanning over several sections of the ipc (15) 15
general tagging of new technological developments (15) 15
holography (15) 15
macromolecular compounds obtained otherwise than by reactionsonly involving unsaturated carbon-to-carbon bonds (15) 15
organic macromolecular compounds (15) 15
photography (15) 15
spectacles (15) 15
sunglasses or goggles insofar as they have the same featuresas spectacles (15) 15
technical subjects covered by former us classification (15) 15
technical subjects covered by former uspc (15) 15
technical subjects covered by former uspc cross-reference art collections [xracs] and digests (15) 15
their preparation or chemical working-up (15) 15
molecular switches (13) 13
photochemistry (13) 13
science & technology - other topics (13) 13
analysis (11) 11
light (11) 11
nanoscience & nanotechnology (11) 11
chemical properties (10) 10
nanoparticles (10) 10
photochromie (10) 10
research (10) 10
basic electric elements (9) 9
current collectors (9) 9
electricity (9) 9
line connectors (9) 9
social sciences (9) 9
holographic processes or apparatus (8) 8
life sciences & biomedicine (8) 8
performing operations (8) 8
photochromic materials (8) 8
physics, applied (8) 8
transporting (8) 8
auxiliary processes in photography (7) 7
exact sciences and technology (7) 7
molecular structure (7) 7
nanopartikel (7) 7
photographic processes, e.g. cine, x-ray, colour,stereo-photographic processes (7) 7
photosensitive materials for photographic purposes (7) 7
physics, condensed matter (7) 7
fluorescence (6) 6
nanoparticles - chemistry (6) 6
photochemie (6) 6
photochemische reaktion (6) 6
sense of community (6) 6
animals (5) 5
chemistry, inorganic & nuclear (5) 5
dithienylethene (5) 5
dithienylethenes (5) 5
gold - chemistry (5) 5
humans (5) 5
isomers (5) 5
optical properties (5) 5
photochromer stoff (5) 5
polymers (5) 5
removable external protective coverings specially adapted forvehicles (5) 5
usage (5) 5
vehicles in general (5) 5
windows, windscreens, non-fixed roofs, doors, or similardevices for vehicles (5) 5
community (4) 4
electric properties (4) 4
management (4) 4
metal nanoparticles - chemistry (4) 4
molecular devices (4) 4
molekulare schalter (4) 4
photochemical processes (4) 4
polymer (4) 4
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