DIFF Subgroup
G04C 21/02 Constructional details (G04C21/04, G04C21/16 take precedence)
Introduced: September 1968
Title
Titles differ between systems:
IPC: Constructional details
CPC: Constructional details (G04C21/04, G04C21/16 take precedence)
Full Title
Full titles differ between systems:
IPC:
Producing acoustic time signals by electrical means > Constructional details
CPC:
Producing acoustic time signals by electrical means > Constructional details (G04C21/04, G04C21/16 take precedence)
No child classifications to compare. This is a leaf node in both IPC and CPC.