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Patent classifications
A
HUMAN NECESSITIES
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A42
HEADWEAR
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A42B
HATS; HEAD COVERINGS
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3/00
Helmets; Helmet covers; ; Other protective head coverings;
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A42B3/04
Parts, details or accessories of helmets
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A42B3/0406
Accessories for helmets
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A42B3/042
Optical devices
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A42B3/0426
Rear view devices or the like
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