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Patent (27228) 27228
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chemistry (29031) 29031
metallurgy (27229) 27229
electricity (26410) 26410
basic electric elements (26056) 26056
semiconductor devices (26000) 26000
electric solid state devices not otherwise provided for (25937) 25937
organic chemistry (23332) 23332
dyes (22559) 22559
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materials for miscellaneous applications, not provided forelsewhere (21866) 21866
heterocyclic compounds (15154) 15154
electric techniques not otherwise provided for (10919) 10919
electric heating (10914) 10914
electric lighting not otherwise provided for (10914) 10914
acyclic, carbocyclic or heterocyclic compounds containingelements other than carbon, hydrogen, halogen, oxygen, nitrogen,sulfur, selenium or tellurium (8250) 8250
acyclic or carbocyclic compounds (5868) 5868
general tagging of cross-sectional technologies spanning over several sections of the ipc (5518) 5518
general tagging of new technological developments (5518) 5518
technical subjects covered by former uspc cross-reference art collections [xracs] and digests (5518) 5518
compositions based thereon (5233) 5233
organic macromolecular compounds (5233) 5233
their preparation or chemical working-up (5233) 5233
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physical sciences (3992) 3992
macromolecular compounds obtained otherwise than by reactionsonly involving unsaturated carbon-to-carbon bonds (3838) 3838
organic light emitting diodes (3691) 3691
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physics (3449) 3449
technical subjects covered by former uspc cross-reference artcollections [xracs] and digests (3354) 3354
lakes (2440) 2440
mordants (2440) 2440
organic dyes or closely-related compounds for producing dyes (2440) 2440
technologies or applications for mitigation or adaptation againstclimate change (2306) 2306
technology (2297) 2297
materials science (2132) 2132
reduction of greenhouse gas [ghg] emissions, related to energygeneration, transmission or distribution (2087) 2087
exact sciences and technology (1987) 1987
materials science, multidisciplinary (1893) 1893
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physics, applied (1507) 1507
electroluminescence (1456) 1456
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physicochemistry of polymers (1094) 1094
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semiconductor electronics. microelectronics. optoelectronics. solid state devices (1040) 1040
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chemistry, multidisciplinary (937) 937
physics, condensed matter (896) 896
preparation, kinetics, thermodynamics, mechanism and catalysts (857) 857
macromolecular compounds obtained by reactions only involvingcarbon-to-carbon unsaturated bonds (824) 824
use of inorganic or non-macromolecular organic substances ascompounding ingredients (816) 816
transporting (811) 811
polymers with particular properties (804) 804
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organic light-emitting diodes (682) 682
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photoluminescence (645) 645
technical subjects covered by former us classification (604) 604
light emitting diodes (600) 600
inks (598) 598
chemical paint or ink removers (593) 593
coating compositions, e.g. paints, varnishes orlacquers (593) 593
correcting fluids (593) 593
filling pastes (593) 593
pastes or solids for colouring or printing (593) 593
polymers (593) 593
use of materials therefor (593) 593
woodstains (593) 593
nanoscience & nanotechnology (592) 592
display (576) 576
conductors (566) 566
insulators (562) 562
cables (560) 560
selection of materials for their conductive, insulating ordielectric properties (558) 558
stock exchanges (505) 505
education (499) 499
transistors (497) 497
advertising (495) 495
cryptography (495) 495
seals (494) 494
diodes (481) 481
luminescence (476) 476
signs (466) 466
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Online Resources - Online (39) 39
Engineering & Comp. Sci. - Stacks (16) 16
Gerstein Science - Stacks (8) 8
Collection Dvlpm't (Acquisitions) - Vendor file (4) 4
Physics - Stacks (2) 2
UofT at Mississauga - Stacks (2) 2
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English (34538) 34538
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