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| More topics under "G02 - Optics" (911,826) |
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| G02B - Optical elements, systems, or apparatus (596,245) | | G02C - Spectacles; Sunglasses or goggles insofar as they have the same features as spectacles; Contact lenses (52,598) | | G02F - 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 demodulating; Techniques or procedures for the operation thereof; Frequency-changing; Non-linear optics; Optical logic elements; Optical analogue/digital converters (262,983) |
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