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Class Number Class Name Patents
372 Coherent light generators 54,439
362 Illumination 129,157
382 Image analysis 140,593
385 Optical waveguides 104,621
359 Optical: systems and elements 158,241
353 Optics: image projectors 19,899
356 Optics: measuring and testing 87,044
352 Optics: motion pictures 4,327
396 Photography 47,912
D16 Photography and optical equipment 14,480
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