Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
Load children
B21
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
Load children
B21D
WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
Load children
31/00
Other methods for working sheet metal, metal tubes, metal profiles
Load children Filter patents View analytics View as hierarchy
B21D31/04
Expanding other than provided for in groups B21D1/00 - B21D28/00, e.g. for making expanded metal
Load children Filter patents View analytics View as hierarchy