A
HUMAN NECESSITIES
A
HUMAN NECESSITIES
A42
HEADWEAR
A42
HEADWEAR
A42B
HATS; HEAD COVERINGS
A42B
HATS; HEAD COVERINGS
A42B3/00
Helmets; Helmet covers; ; Other protective head coverings;
A42B3/00
Helmets; Helmet covers; ; Other protective head coverings;
A42B3/04
Parts, details or accessories of helmets
A42B3/04
Parts, details or accessories of helmets
A42B3/06
Impact-absorbing shells, e.g. of crash helmets
A42B3/06
Impact-absorbing shells, e.g. of crash helmets
A42B3/062
with reinforcing means
A42B3/062
with reinforcing means
A42B3/063
using layered structures
A42B3/063
using layered structures
A42B3/064
with relative movement between layers
A42B3/064
with relative movement between layers