DIFF Subgroup
F25D 23/02 Doors; Covers (F25D23/08 takes precedence )
Introduced: September 1968
Title
Titles differ between systems:
IPC: Doors; Covers
CPC: Doors; Covers (F25D23/08 takes precedence )
Full Title
Full titles differ between systems:
IPC:
General constructional features > Doors; Covers
CPC:
General constructional features (F25D21/00 takes precedence) > Doors; Covers (F25D23/08 takes precedence )
CPC subdivides this area 6x more granularly than IPC with 5 additional codes.
5 codes are CPC-only extensions.
Child Classifications
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