Patent classifications
C
CHEMISTRY; METALLURGY
Load children
C21
METALLURGY OF IRON
Load children
C21D
MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
Load children
2221/00
Treating localised areas of an article
Load children Filter patents View analytics View as hierarchy
C21D2221/01
End parts (e.g. leading, trailing end)
Filter patents View analytics View as hierarchy