Patent classifications
G
PHYSICS
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G02
OPTICS
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G02B
OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
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1/00
Optical elements characterised by the material of which they are made; Optical coatings for optical elements
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G02B1/10
Optical coatings produced by application to, or surface treatment of, optical elements
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G02B1/18
Coatings for keeping optical surfaces clean, e.g. hydrophobic or photo-catalytic films
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