DIFF Subgroup
B28B 11/08 for reshaping the surface, e.g. smoothing, roughening, corrugating, making screw-threads
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Apparatus or processes for treating or working the shaped articles > for reshaping the surface, e.g. smoothing, roughening, corrugating, making screw-threads
CPC:
Apparatus or processes for treating or working the shaped articles (specially adapted for tubular articles B28B21/92; decoration or surface treatment in general B05, B44; compacting concrete in situ in connection with building E04G21/06; drying F26) > for reshaping the surface, e.g. smoothing, roughening, corrugating, making screw-threads
CPC subdivides this area 9x more granularly than IPC with 8 additional codes.
8 codes are CPC-only extensions.
Child Classifications
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